EXERCISE - 1C

How lateral displacement produced by an optical block is related to refractive index of the block?

How lateral displacement produced by an optical block is related to angle of incidence?

By drawing a neat diagram show why does a coin placed in a water tank appear raised?

Draw a ray diagram showing the path of rays of light when it enters with oblique incidence from water into air.

An object is placed at a distance of $24 \mathrm{cm}$ from the optical centre of a convex lens of focal length $18 \mathrm{cm}$. Find the distance of the image from the lens. What will be the height of the image if the object is $3.0 \mathrm{cm}$ tall?
 

A transparent medium A floats on another transparent medium B. When a ray of light travels obliquely from A into B, the refracted ray bends away from the normal. Which of the two media A and B is optically denser and why?

Write the laws of refraction. Explain the same with the help of a ray diagram, when a ray of light passes through a rectangular glass slab.   

A ray of light incident obliquely on the face of a rectangular glass block placed in air emerges from the opposite face parallel to the incident ray. State two factors on which lateral displacement of emergent ray depends on the emergent ray.