Talk:2484: H-alpha - Revision history

141.101.98.175 at 11:46, 4 October 2023

2023-10-04T11:46:56Z

Danger Kitty at 21:45, 3 October 2023

2023-10-03T21:45:33Z

162.158.134.100: The solar filter in 1828 is surely not a hydrogen-alpha filter.

2021-07-10T20:08:29Z

The solar filter in 1828 is surely not a hydrogen-alpha filter.

Kynde: /* Additional detail */ remove section

2021-07-06T11:31:18Z

‎Additional detail: remove section

172.68.110.116 at 13:10, 5 July 2021

2021-07-05T13:10:44Z

172.69.142.62 at 20:02, 4 July 2021

2021-07-04T20:02:45Z

RIIW - Ponder it at 20:27, 3 July 2021

2021-07-03T20:27:44Z

162.158.183.220: more on the use of H-alpha filters

2021-07-03T11:52:13Z

162.158.142.160: additional detail

2021-07-03T06:29:25Z

additional detail

162.158.89.49 at 06:18, 3 July 2021

2021-07-03T06:18:32Z

@@ Line 10: / Line 10: @@
+I
 The Hindenberg was supposed to be using Helium, but the USA was the prime producer at that time and for some reason refused to supply Germany at the time.  This forced the use of Hydrogen, with the regrettable result. Choice of exterior paint, the gas 'bag' design being too permeable and lack of earthing were also factors. [[User:RIIW - Ponder it|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it|talk]]) 20:27, 3 July 2021 (UTC)
-For some reason? Germany was ruled by nazis at the time. [[User:Danger Kitty|Danger Kitty]] ([[User talk:Danger Kitty|talk]]) 21:45, 3 October 2023 (UTC)
+:For some reason? Germany was ruled by nazis at the time. [[User:Danger Kitty|Danger Kitty]] ([[User talk:Danger Kitty|talk]]) 21:45, 3 October 2023 (UTC)
 {{w|MetLife|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps. [[Special:Contributions/162.158.142.160|162.158.142.160]] 06:29, 3 July 2021 (UTC) Not the Red Baron

@@ Line 10: / Line 10: @@
+I
 The Hindenberg was supposed to be using Helium, but the USA was the prime producer at that time and for some reason refused to supply Germany at the time.  This forced the use of Hydrogen, with the regrettable result. Choice of exterior paint, the gas 'bag' design being too permeable and lack of earthing were also factors. [[User:RIIW - Ponder it|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it|talk]]) 20:27, 3 July 2021 (UTC)
 {{w|MetLife|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps. [[Special:Contributions/162.158.142.160|162.158.142.160]] 06:29, 3 July 2021 (UTC) Not the Red Baron

← Older revision		Revision as of 20:08, 10 July 2021
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	About the Warning: i don't think that a filter has the ability, to hurt anyone. Therefore it should be rephrased, that the remaining sunlight will still hurt you eyes.		About the Warning: i don't think that a filter has the ability, to hurt anyone. Therefore it should be rephrased, that the remaining sunlight will still hurt you eyes.
	[[Special:Contributions/172.68.110.116\|172.68.110.116]] 13:10, 5 July 2021 (UTC)		[[Special:Contributions/172.68.110.116\|172.68.110.116]] 13:10, 5 July 2021 (UTC)
		+
		+	The solar filter in 1828 is surely not a hydrogen-alpha filter. The picture of the sun in that strip doesn't show the deep red hydrogen-alpha color, and it doesn't make sense to set the white balance while using a narrow-band filter. [[Special:Contributions/162.158.134.100\|162.158.134.100]] 20:08, 10 July 2021 (UTC)

@@ Line 4: / Line 4: @@
 - unsigned comment
-===Additional detail===
+;Additional detail
 A H(ydrogen)-Alpha filter is a special lens used for viewing the {{w|H-alpha|Hydrogen-Alpha}} wavelength of light through telescopic or photographic devices. It works by filtering out all wavelengths of light except the red spectral line associated with hydrogen. This is commonly used to see shape and structure of objects that emit said light (namely, our own sun, and various nebulae as mentioned in the text).
@@ Line 11: / Line 11: @@
 The Hindenberg was supposed to be using Helium, but the USA was the prime producer at that time and for some reason refused to supply Germany at the time.  This forced the use of Hydrogen, with the regrettable result. Choice of exterior paint, the gas 'bag' design being too permeable and lack of earthing were also factors. [[User:RIIW - Ponder it|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it|talk]]) 20:27, 3 July 2021 (UTC)
-{{w|MetLife|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps.
+{{w|MetLife|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps. [[Special:Contributions/162.158.142.160|162.158.142.160]] 06:29, 3 July 2021 (UTC) Not the Red Baron
 Many nebulae contain excited hydrogen atoms emitting the H<sub>α</sub> wavelength, so a H<sub>α</sub> filter is useful for removing other light such as light pollution, making nebulae stand out in photographs.
@@ Line 19: / Line 17: @@
 In most cases when a sun filter is mentioned, it's probably a white-light filter that only reduces the light intensity. A H<sub>α</sub> filter is used to highlight the sun's chromosphere – the layer above the sun's apparent "surface", the photosphere.
-I'm not sure whether the same filters are actually used for photographing both the sun and nebulae.
+I'm not sure whether the same filters are actually used for photographing both the sun and nebulae. [[Special:Contributions/162.158.183.220|162.158.183.220]] 11:52, 3 July 2021 (UTC)
 I think someone should edit the summary to detail two points: One, that blimps are not the same as zeppelins. The latter has a rigid body and tanks of gas, rather than the former's balloon body. And two, airships such as the Hindenburg were never designed to be flown using hydrogen; it would have continued to use helium on that one fateful flight if it had not been for a trade embargo on Germany for the gas from its largest supplier, the United States.

← Older revision		Revision as of 13:10, 5 July 2021
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	I don't believe blimps have really ever been flown with hydrogen, but someone who knows better should add it.		I don't believe blimps have really ever been flown with hydrogen, but someone who knows better should add it.
	[[Special:Contributions/172.69.142.62\|172.69.142.62]] 20:02, 4 July 2021 (UTC)		[[Special:Contributions/172.69.142.62\|172.69.142.62]] 20:02, 4 July 2021 (UTC)
		+
		+	About the Warning: i don't think that a filter has the ability, to hurt anyone. Therefore it should be rephrased, that the remaining sunlight will still hurt you eyes.
		+	[[Special:Contributions/172.68.110.116\|172.68.110.116]] 13:10, 5 July 2021 (UTC)

← Older revision		Revision as of 20:02, 4 July 2021
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	[[Special:Contributions/162.158.183.220\|162.158.183.220]] 11:52, 3 July 2021 (UTC)		[[Special:Contributions/162.158.183.220\|162.158.183.220]] 11:52, 3 July 2021 (UTC)
		+
		+	I think someone should edit the summary to detail two points: One, that blimps are not the same as zeppelins. The latter has a rigid body and tanks of gas, rather than the former's balloon body. And two, airships such as the Hindenburg were never designed to be flown using hydrogen; it would have continued to use helium on that one fateful flight if it had not been for a trade embargo on Germany for the gas from its largest supplier, the United States.
		+
		+	I don't believe blimps have really ever been flown with hydrogen, but someone who knows better should add it.
		+	[[Special:Contributions/172.69.142.62\|172.69.142.62]] 20:02, 4 July 2021 (UTC)

← Older revision		Revision as of 20:27, 3 July 2021
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	Many earlier designs for {{w\|airship\|airships}} (including the ill-fated {{w\|LZ_129_Hindenburg\|Hindenburg}}) used (highly flammable) hydrogen gas for lift due to both its lower cost and higher availability. After the Hindenburg disaster designers switched exclusively to helium or heated air for lift.		Many earlier designs for {{w\|airship\|airships}} (including the ill-fated {{w\|LZ_129_Hindenburg\|Hindenburg}}) used (highly flammable) hydrogen gas for lift due to both its lower cost and higher availability. After the Hindenburg disaster designers switched exclusively to helium or heated air for lift.
		+	I
		+	The Hindenberg was supposed to be using Helium, but the USA was the prime producer at that time and for some reason refused to supply Germany at the time. This forced the use of Hydrogen, with the regrettable result. Choice of exterior paint, the gas 'bag' design being too permeable and lack of earthing were also factors. [[User:RIIW - Ponder it\|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it\|talk]]) 20:27, 3 July 2021 (UTC)

	{{w\|MetLife\|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w\|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps.		{{w\|MetLife\|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w\|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps.

← Older revision		Revision as of 11:52, 3 July 2021
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	[[Special:Contributions/162.158.142.160\|162.158.142.160]] 06:29, 3 July 2021 (UTC) Not the Red Baron		[[Special:Contributions/162.158.142.160\|162.158.142.160]] 06:29, 3 July 2021 (UTC) Not the Red Baron
		+
		+	Many nebulae contain excited hydrogen atoms emitting the H<sub>α</sub> wavelength, so a H<sub>α</sub> filter is useful for removing other light such as light pollution, making nebulae stand out in photographs.
		+
		+	In most cases when a sun filter is mentioned, it's probably a white-light filter that only reduces the light intensity. A H<sub>α</sub> filter is used to highlight the sun's chromosphere – the layer above the sun's apparent "surface", the photosphere.
		+
		+	I'm not sure whether the same filters are actually used for photographing both the sun and nebulae.
		+
		+	[[Special:Contributions/162.158.183.220\|162.158.183.220]] 11:52, 3 July 2021 (UTC)

← Older revision		Revision as of 06:29, 3 July 2021
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	<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->		<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->
	I think the first company that got really mad was Goodyear, because they're famous for using blimps.		I think the first company that got really mad was Goodyear, because they're famous for using blimps.
		+
		+	- unsigned comment
		+
		+	===Additional detail===
		+	A H(ydrogen)-Alpha filter is a special lens used for viewing the {{w\|H-alpha\|Hydrogen-Alpha}} wavelength of light through telescopic or photographic devices. It works by filtering out all wavelengths of light except the red spectral line associated with hydrogen. This is commonly used to see shape and structure of objects that emit said light (namely, our own sun, and various nebulae as mentioned in the text).
		+
		+	Many earlier designs for {{w\|airship\|airships}} (including the ill-fated {{w\|LZ_129_Hindenburg\|Hindenburg}}) used (highly flammable) hydrogen gas for lift due to both its lower cost and higher availability. After the Hindenburg disaster designers switched exclusively to helium or heated air for lift.
		+
		+	{{w\|MetLife\|Metropolitan Life Insurance Company}} (AKA MetLife) is an insurance company that licensed the Peanuts characters, In particular, Snoopy in their advertising. They featured the {{w\|Snoopy}} character in his alter-ego role of World War I Fighter Ace (which frequently fought with the Red Baron in the Charles Schulz comics) in both print and television ads between 1985 and 2016, and most notably pictured on some of their advertising blimps.
		+
		+	[[Special:Contributions/162.158.142.160\|162.158.142.160]] 06:29, 3 July 2021 (UTC) Not the Red Baron

← Older revision		Revision as of 06:18, 3 July 2021
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	<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->		<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->
		+	I think the first company that got really mad was Goodyear, because they're famous for using blimps.