Light

Question 1

3 primary colours of light

Answer 1

Red, Green, Blue

Question 2

Explain what is meant by refractive index

Answer 2

Ratio of sine of the angle of incidence

Question 3

converging beam

Answer 3

Light spreading out like in a torch

Question 4

Divierging beam

Answer 4

Light getting narrower

Question 5

parallel beam

Answer 5

light remains same width

Question 6

Convex mirror

Answer 6

image is always virtual and located behind the mirror

Question 7

Concave mirror

Answer 7

object outside of the focus-real image
inside OR at the focus-virtual image

Question 8

What is refraction

Answer 8

the bending of a ray of light when it goes from one medium to another

Question 9

what is the Critical angle

Answer 9

when light travels from a denser to a rarer medium the angle of incidence who’s corresponding angle of refraction is 90 degrees

Question 10

what is the unit of the power of the lense

Answer 10

M to the power of -1

Question 11

Short and long sightedness corrected with what type of lense

Answer 11

short-concave
long-convex