Question

a}On what two factors shape of the shadow depends ?
b}What is rectilinear propagation of light​

Answer 1

Explanation:

1. the size of the shadow depend on the size of the object the distance from the light to the object and distance from the light to screen
2. rectilinear propagation of light is

the tendency of light which travels in straight line

hope this answer will help you

Answer 2

Answer:

Rectilinear propagation of light is a 'rule' that states that light can only travel in straight lines without bending