Question

-
The angle between the incident ray and the
ray reflected from the plane mirror is 70°
The angle of incidence will be :
(i)70°
(ii) 30°
(iii) 35°
(iv) 90°​

Answer 1

Answer:

70° is the right answer

Explanation:

angle of refraction= angle of incidence

Answer 2

Answer:

the angle of incidence will be :

iii) 35°

explaination :

let the angle of incident ray be I

and angle of reflected ray be R

here,

R + I = 70

we know,

R = I

so,

I + I = 70

2 I =70

I = 70 / 2

I = 35°

it means,

R = 35°

the angle of incidence will be :

iii) 35