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Two mirrors are inclined at angle theta...

Two mirrors are inclined at angle `theta` as shown in figure. Light rays are incident parallel to one of mirrors. Light will start retracing its path after the reflection if

A

`theta = 45^(@)`

B

`theta = 30^(@)`

C

`theta = 60^(@)`

D

all three

Text Solution

Verified by Experts

The correct Answer is:
B

`DeltaOAB implies theta + theta + 90 + theta = 180^(@), implies theta= 30^(@)`
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ALLEN -GEOMETRICAL OPTICS-EXERCISE-2
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  2. As shown in the figure a particle is placed at O in front of a plane m...

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  3. Two plane mirrors are placed parallel to each other at a distance L ap...

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  4. A light ray I is incident on a plane mirror M.The mirror is rotated in...

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  5. Shown plane mirror is lying in y-z plane. A particle P has velocity ve...

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  6. There are two plane mirror with reflecting suface faciing each other.T...

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  7. In the diagram shown, all the velocities are given with respect to ear...

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  8. A point source of lightS is placed in front of two large mirros as sh...

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  9. A ray reflected successively from two plane mirrors inclined at a cert...

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  10. A ray of light is incident on a concave mirror . It is parallel to the...

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  11. An infinitely long rod lies along the axis of a concave mirror of foca...

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  12. A short linear object of length b lies along the axis of a concave mir...

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  13. What is the length of the image of the rod in mirror, according to the...

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  14. Two thin slabs of refractive indices mu(1) and mu(2) are placed parall...

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  15. A point source S is placed at the bottom of different layers as shown ...

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  16. A ray of light of refractive index 1.4approaches the boundary surface ...

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  17. A ray of light strikes a cubical slab surrounded by air as shown in th...

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  18. A cubical block of glass of refractive index n1 is in contact with the...

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  19. A beam of diameter 'd' is incident on a glass hemisphere. If the radiu...

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  20. When the object is at distance u(1)andu(2)the images formed by the sa...

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