Question

The following diagram (Fig 4.21) shows an
incident ray AO and the normal ON on a plane
mirror. Find the angle of incidence and angle of
reflection.
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Answer 1

Answer:

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Answer 2

Answer:

we know that :

Normal(No) is perpendicular to the reflecting surface.

According to laws of reflection

Angle of incidence (i)= angle of reflection (r).

,

ANGLE OF INCIDENCE = ANGLE BETWEEN NORMAL AND THE INCIDENT RAY.

ANGLE OF REFLECTION = ANGLE BETWEEN NORMAL AND REFLECTED RAY.

SO,

<AON = 90 - 30.

<AON = 60.

SO, WE KNOW THAT ANGLE OF REFLECTION = ANGLE OF INCIDENCE.

NOW,

<AON = <NOM

60 = <NOM.

so,

angle of reflection = 60

angle of incidence =60

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