Light

Question 1

Laws of Reflection of Light

Answer 1

Angle of incidence equals to angle of reflection.

Incidence ray, reflected ray and normal at the point of incidence all lies on the same plane.

Question 2

Characteristic of Reflection

Answer 2

Virtual Image
Upright
Laterally Inverted
Image distance equals to object distance
Same size

Question 3

Real Image

Answer 3

An image that can be captured on a screen and is formed by the intersection of light rays from the object at the screen

Question 4

Virtual image

Answer 4

Cannot be captured on a screen and is formed by the intersection of the mifbt rays that appear to come from the image

Question 5

Refraction of Light

Answer 5

Bending of light as it passes from one optical medium to another due to the change in the speed of light

Question 6

Laws of Refraction of Light

Answer 6

Incident ray, refracted ray and the normal at the point of incidence all lie on the same plane

The ration of sin i to sin r is constant for two given media

Question 7

Refractive index

Answer 7

n= sin i/sin r
n= speed of light in vacuum/speed of light in medium

Question 8

Total Internal Reflection

Answer 8

The complete reflection of a light ray inside an optically denser medium at its boundary with an optically less dense medium

Question 9

Conditions to TIR

Answer 9

Light ray should be inside the optically denser medium, heading towards the boundary with an optically less dense medium
i > c

Question 10

Critical angle

Answer 10

i in optically denser medium for r of optically less dense medium is 90•
n=1/sin c