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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 Oct 2007 19:09:46 IST
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if the wavelength of incident light on a i) concave mirror and ii) convex lens is increased, how will the focal length of each of these change?
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21 Oct 2007 19:32:54 IST
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as d wavelength of a light is increased, its focal length on concave miror will increase while that on convex mirror will decrease
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21 Oct 2007 23:28:47 IST
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In case of mirro there will be no effect.
For a mirror increase in wavelength means increase in refractive index and hence decreased focal length
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Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
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22 Oct 2007 06:28:13 IST
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two different answers..pls check it once again..i donno which is right....
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in case of mirror no effect
it depends on radius only
in case of lens
use lens maker formula
wavelength increases so refractive index inc.
and hence focus increases........
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