Question

Which of the following is not the effect of refraction of light when it travels from a denser medium to a rarer medium?
A. Bending of stick
B. Coin placed at the bottom container not visible when seen from outside
C. Both
D. None

Answer 1

Hint:The phenomenon of bending of the light ray at the interface of two different mediums is known as refraction of light. Since the light rays change their direction at the interface of two different mediums, the object from which the light rays are coming appears to be located at a different position other than its original position.

Complete answer:
Let us first understand what is meant by the phenomenon of refraction. The phenomenon of refraction is related to light or any other waves. It is seen that when a ray of light passes from one medium to another medium, the ray of light appears to be bending at the interface of the two mediums.

This means that when a light ray travels from one medium to another medium, it changes its direction at the interface of the two mediums.The phenomenon of bending of the light ray at the interface of two different medium is known as refraction of light. There are several effects which can be seen due to refraction of light.

Since the light rays change their direction at the interface of two different mediums, the object from which the light rays are coming appears to be located at a different position other than its original position (i.e. Without the second medium).

As a result, a stick kept is water appears to be bent at the interface of the water and the air outside.Similarly, a coin placed at the bottom of the container appears to be raised or not visible at a certain angle, due to the refraction of light.

Hence, the correct option is C.

Note:The phenomenon of refraction of light cannot be explained if we consider that light travels in a straight line. Refraction of light can only be explained by considering it as a wave (i.e. Huygens principle). This also proves the existence of the dual nature of light.