25 For the following questions refer to the diagram below CA

25. For the following questions, refer to the diagram below. CA) What is the term for the dotted line perpendicular to the mirror\'s surface in the figure above? (B) If angle A in the figure above is equal to 35 what is the measure of angle B? How do you know? 26. (A) If you stand 1 meter in front of a plane mirror, how far away from you does your image appear to be? (B) If you are 1 meter away from a plane mirror and approach the mirror at 1 m/s, how long does it take you to reach your image? (C) At what speed do you approach your image if you walk towards a plane mirror at 1 m/s? Explain. (Hint: the answer is not m/s.) (more) 106

Solution

25)

A) the dotted line that is perpendicular to the mirror\'s surface is called Normal

B)

angle B is 35 degree.

as angle of incidence = angle of reflection

thetaA = thetaB

angle B = 35 degree

26)

A) as for plane mirror

image distance = object distance

image distance from mirror = 1 m

B)

as the image velocity = object velocity

image velocity , v = 1 m/s

image distance = 1 m

time taken to reach image = time taken to reach mirror

time taken to reach image = 1/1
time taken to reach image = 1 s

the time taken to reach image is 1 s

C)

as the velocity of image is equal and oposite to the velocity of person

speed of approach of image = 2 * speed of object

speed of approach of image = 2 * 1 m/s

speed of approach of image = 2 m/s