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When light rays from the sun fall on a convex lens along a direction parallel to its axis |
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a) |
Focal length for all colours is the same |
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b) |
Focal length for violet colour is the shortest |
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c) |
Focal length for yellow colour is the longest |
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d) |
Focal length red colour is the shortest |
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When light rays from the sun fall on a convex lens along a direction parallel to its axis |
|
|
a) |
Focal length for all colours is the same |
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b) |
Focal length for violet colour is the shortest |
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c) |
Focal length for yellow colour is the longest |
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d) |
Focal length red colour is the shortest |
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(b) Focal length for violet colour is minimum |