Question

answer this ques physics class 10 chapter 10​

Answer 1

Answer:

sorry I don't know because I'm 9thclass.

Explanation:

hope it helps you.

Answer 2

Question :

If a ray of light suffers successive reflections at two mirrors (inclined at an angle θ), show that after falling on the first mirror at an angle of incidence α, its total deviation is independent of α. What happens when θ = 90° ?

Solution :

★ Angle of deviation :

• The difference between the angle of incidence and the angle of refraction of a ray of light is called angle of deviation.

For a light ray incident at an angle 'i' on getting reflected the angle of deviation is given by

• d = 180 - 2i

Let's come to the question.

A ray of light is inclined at an angle of α on first mirror. After reflection, let it strikes at angle of β on second mirror$.$

❒ Deviation at point A :

➛ d₁ = 180 - 2α

❒ Deviation at point B :

➛ d₂ = 180 - 2β

Net deviation suffered by ray of light :

➝ d = d₁ + d₂

➝ d = 180 - 2α + 180 - 2β

➝ d = 360 - 2(α + β)

From the geometry, α + β = θ

∴ d = 360 - 2θ

So we can say that, total deviation suffered by ray of light is independent of α.

Angle of deviation when angle between both mirrors is 90° will be 180°.