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Which mirror is to be used to obtain a parallel beam of light from a small lamp? |
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a) |
Plane mirror |
b) |
Convex mirror |
c) |
Concave mirror |
d) |
Any one of these |
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Which mirror is to be used to obtain a parallel beam of light from a small lamp? |
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|
a) |
Plane mirror |
b) |
Convex mirror |
c) |
Concave mirror |
d) |
Any one of these |
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(c) It lamp is placed at the focus of concave mirror then we get parallel beam of light. |