A stick partly immersed in water appears to be bent. Draw a ray diagram to show the bending of the stick. When placed in water and viewed obliquely from above. 

Name one factor that affects the lateral displacement of light as it passes through a rectangular glass slab. 

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.

i) What change is observed in the appearance of the pencil?

ii) Name the phenomenon responsible for the change.

A ray of light is moving from a rarer medium to a denser medium and strikes a plane mirror placed at 90^o to the direction of the ray as shown in the diagram.

i) Copy the diagram and mark arrows to show the path of the ray of light after it is reflected from the mirror.

A ray of light is incident as a normal ray on the surface of separation of two different medium. What is the value of the angle of incidence in this case? 

Draw the diagram given below and clearly show the path taken by the emergent ray. 

A ray of light from water to air. How does the speed of light change? 

Name the factors affecting the critical angle for the pair of media.