Answer the following questions
What happens when a ray of light is incident normal to the interface between two media ? Draw the corresponding neat and labelled diagram.

When a ray of light is incident normally on a surface, then

When a ray of light is incident normally on a surface, then

Answer the following questions: What is a ray diagram?

Answer the following questions : What happens when light falls on the retina ?

Answer the following questions: What is the use of a ray diagram?

Answer the following : What will happen when a light ray is incident perpendicular to the mirror ?

When a ray of monochromatic light is incident obliquely on the interface of two media,

Answer the following questions : Draw neat labelled diagrams : Types of lenses.

State using a neat diagram, what happens to the path of light when light ray is incident normally at the boundary between two media.

Answer the following questions A ray of light is incident thobliquely at a boundary separating two media . What is its behaviour if the refractive index of the first medium is greater than that of the second medium ? Draw the corresponding neat and labelled diagrams.