Multiple Glass Slabs with Same R.I

Q. Why is emergent ray parallel to the incident ray after coming out through a rectangular glass slab?

Q.

What do you understand by the term given below?

A parallel beam of light

Q. The incident ray and the emergent ray are parallel when the ray of light passes through multiple glass slabs.

1. True
2. False

Q. Define the following terms :
Incident ray

Q.

PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below:

The position of image of the object P when seen obliquely from above will be

1. Obliquely above P in water

2. Vertically above P in water

3. Vertically above P in air

4. Obliquely above P in air

Q. The incident ray and the emergent ray are parallel when the ray of light passes through multiple glass slabs.

1. True
2. False