Advertisements
Advertisements
Question
The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him?
Solution
The image approaches him at a speed of 2 m/s . The reason being, the image moves at a speed of 1 m/s and
the relative speed of the image will be equal to the sum of the speeds of the image and the boy.
APPEARS IN
RELATED QUESTIONS
Write all the capital letters of the alphabet which look the same in a plane mirror.
When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?
In which material do you think light rays travel faster-glass or air?
Which phenomenon of light makes the water to appear shallower than it really is?
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
The phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.
Lights of different colours are used as signal for safety transport. From these, the wavelength of red light is _______ nm.
Why a pencil partly immersed in water appears to be bent at the water surface.
The bottom of swimming pool appears to be less deep than the actual one because of