Question:
What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
Answer:
If the reflected ray is at an angle of 90° to the incident ray, then the angle of incidence is 45 °. According to the law of reflection, the angle of incidence is equal to the angle of reflection. Therefore, the angle of incidence and the angle of reflection both are = (90/2) = 45°.
Q 3.
(a)Find out the position of the image of an object situated at A in the plane mirror (Fig. 16.21).(b)Can Paheli at B see this image?(c)Can Boojho at C see this image?(d)When Paheli moves from B to C, where does the image of A move?