Test SeriesFree PYQsExamsPricing

NEET 2017 Physics question

PhysicsRay Optics and Optical InstrumentsNEET 2017

A beam of light from a source is incident normally on a plane mirror fixed at a certain distance from the source. The beam is reflected back as a spot on a scale placed just above the source . When the mirror is rotated through a small angle , the spot of the light is found to move through a distance on the scale. The angle is given by

Answer: (1)

Solution

When a plane mirror is rotated through an angle the reflected ray (for a fixed incident ray) rotates through . The reflected ray travels the distance back to the scale, so for a

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-092056