Question

an incident ray makes an angle of 65 degrees with a plane than the value of reflected angle is ( ) a) 55 degrees b)45degrees c)35 degrees d)25degrees​

Answer 1

Answer:

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Answer 2

Answer:

Incident ray is making an angle of 65° with the surface of plane mirror.

So, the angle it will make with the normal, i.e., angle of incidence (¡)= 90°-65°=25°

Angle of incidence = Angle of reflection = 25°

According to the law of reflection, the angle of incidence is equal to the angle of reflection.

If the incident ray makes an angle of 65 degree with the surface of plane mirror, than the angle of incidence can be calculated as:

Angle of incidence = 90 – angle made with the plane mirror

 = 90 – 65

 = 25 degree.

Since, the angle of incidence is equal to the angle of reflection, therefore the required angle of reflection = 25 degree.

Angle of reflection is also 65°.

Because we know that

angle of incidence=angle of reflection

65°=angle of reflection

angle of reflection=65° Ans..Angle of incidence    i=35 degrees

According to laws of reflection, the angle of incidence is equal to the angle of reflection.

⟹ Angle of reflection      r=i=35  degrees