Question

NTSE physics question A ray of light is incident on a plane mirror at an angle x. If the angle between the incident and the reflected ray is 80 degree, what is the value of x? 1. 40 2. 50 3. 45 4. 55 Please explain! Thanks

Answer 1

x=50° because
x is the incident ray
angle between incident ray and reflected ray is 80°
incident ray and reflected ray is equal so x+x=2x
total is 180° so, 2x+80°=180°
                        2x=180-80
                        2x=100 = x=100/2 =50
hence 50°

HOPE IT HELPS.........

Answer 2

Answer:

40

Explanation:

angle of incidence = x = angle of reflection

thus 2x = 80

 x = 40