A laser projects light at a mirror. The mirror reflects the light as shown. The angle r is equal to _____ degree.

35

Open in App

Solution

The correct option is A 35

$∠ A O B = 55^{o}$
Also,
$∠ B O O^{'} = 90^{o}$ as it is normal
$∠ A O O^{'} = 90^{o} - 55^{o} = 35^{o}$
Therefore , i = 35°

According to law of reflection,
angle of incidence (i) = angle of reflection (r)
$i = r = 35^{o}$

Suggest Corrections

Similar questions

Q. A laser projects light at a mirror. The mirror reflects the light as shown. The angle r is equal to _____ degree.

Q. Two mirrors are arranged as shown in the figure. Light is incident on the first mirror at an angle of

35^{o}

. The light reflects towards a second mirror. Determine that angle

θ i n d e g r e e s

Q. A beam of light is projected at a mirror as shown. If the beam is tilted towards the mirror, the reflected beam of light will:

Q. A light ray is incident at an angle of 60° on the mirror A which is placed at a right angle to a mirror B as shown in figure. Find the angle of reflection for the ray reflected from mirror B.

Two mirrors meet at right angles. A ray of light is incident on one of the mirrors at an angle of $30$ degrees as shown in figure. Find the reflected angle for the reflection on the second mirror and sketch the reflected ray.

Join BYJU'S Learning Program

A laser projects light at a mirror. The mirror reflects the light as shown. The angle r is equal to _____ degree. 35

The correct option is A 35 ∠AOB=55o Also, ∠BOO′=90o as it is normal ∠AOO′=90o−55o=35o Therefore , i = 35° According to law of reflection, angle of incidence (i) = angle of reflection (r) i=r=35o

A laser projects light at a mirror. The mirror reflects the light as shown. The angle r is equal to _____ degree.

35

The correct option is A 35

$∠ A O B = 55^{o}$
Also,
$∠ B O O^{'} = 90^{o}$ as it is normal
$∠ A O O^{'} = 90^{o} - 55^{o} = 35^{o}$
Therefore , i = 35°

According to law of reflection,
angle of incidence (i) = angle of reflection (r)
$i = r = 35^{o}$