Question

Find the angle of incidence and angle of reflection from the diagram.​

Answer 1

Let the angle of incidence and angle of reflection be x°. (as they are always equal)

The normal ray is always perpendicular to the surface.

That's why,

x° + 35° = 90°

90° - x° = 35° ______(1)

Now on the other side, it should be like this :-

x° + (?)° = 90°

So, that's why,

90° - x° = (?)°

Putting the value of 90° - x° from equation (1) we get,

(?)° = 35°

So now,

35° + x° + x° + 35° = 180° (Linear pair of angles)

70° + 2x° = 180°

2x = 180° - 70°

2x = 110°

x = 110 / 2

x = 55°

Hence, the angle of incidence = 55°

And, the angle of reflection = 55°

Hope it helps...❤️