Atmospheric Refraction

Q.

Give two examples of refraction of light.

Q.

What is atmospheric refraction?

Q. Light travels fastest through which of the following medium?

1. Water
2. Glass
3. Vacuum
4. Air

Q. The optical phenomenon of twinkling of stars is due to atmospheric .

1. refraction
2. diffusion
3. diffraction
4. dispersion

Q. Why a person's leg appears to be short when standing in a water tank;?

Q. Light travels fastest through which of the following medium?

1. Water
2. Glass
3. Vacuum
4. Air

Q.

A rainbow is produced by the

Q.

statement1: There is a time delay between actual sunrise and apparent sunrise.

statement2: Atmospheric refraction is the cause of time delay between actual sunrise and apparent sunrise.

1. Both statements are wrong

2. statement 1 and 2 are correct but statement 2 is not the reason of statement 1

3. Statement 1 and 2 are correct and statement 2 is the correct reason for statement 1

4. Statement 1 is correct but statement 2 is incorrect.

Q.

Stars twinkle due to the refraction of light.

1. True
2. False

Q. A light ray is travelling from denser to rarer medium. The angle of incidence is equal to the critical angle. Then which of the following statements is/are true?

Q. Write the three properties of light.

Q.

When water is poured over a coin kept in a empty cup, the coin appears to raise up.Give reason.

Q. State three features of moon and mercury that are similar. [3 MARKS]

Q. What is electromagnetic radiation ? Why light is considered as a part of the electromagnetic spectrum ?

Q.

Is moonlight polarized?

Q. There are numerous stars even 100 times bigger than the sun in the universe, then why still the univerese is dark?

Q. Refractive index of water with respect to air is 4/3. What is the refractive index of air with respect to water?

Q. Write the three properties of light.

Q.

what does denser and rarer mean?

Q.

for a person sitting near fire, why the objects like trees and houses on the other side of the fire appear SHIFTING??

Q.

Why does the number plate of a car on the highway seems to flicker on a sunny day?

Q. Why sun has elliptical shape on the time when rising and sun setting? It is due to

1. Dispersion
2. Refraction
3. Reflection
4. Scattering