Rainbow

Q.

What is the rainbow? How is rainbow formed?

Q.

Which of the following phenomena of light are involved in the formation of a rainbow?

1. Dispersion
2. Total internal reflection
3. All of the above
4. Refraction

Q.

What is the colour seen at the inner and outer edge of the rainbow respectively?

1. Violet, Red

2. Red, Violet

3. Violet, Blue

4. Orange, Red

Q. The splitting of white light into its component colors is called dispersion.

1. True
2. False

Q. Why we can't touch the rainbow?

Q. What is the order of colours in a rainbow, from the outside to the inside ?

Q.

What is meant by dispersion of white light ? Describe the formation of rainbow in the sky with the help of a diagram.

Q. Mention names of two phenomenon due to which rainbow is formed.

Q.

Can we see rainbow on a sunny day give a situation to support your answer

Q.

A rainbow can be seen in the sky

1. when the sun is in front of you.

2. when the sun is behind you

3. when the sun is overhead.

4. only at the time of sunrise.

Q. _____ act(s) as a prism in formation of a rainbow in the sky.

1. Fog
2. Dust particles
3. Air
4. Raindrops

Q. Explanation for its shape formation! Why is the rainbow formed in semicircle shape ?

Q. Question 5
Which of the following phenomena of light are involved in the formation of a rainbow?

(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

Q. How rainbows are formed in a series of cone ?

Q. Name a natural phenomenon which is caused by the dispersion of sunlight in the sky.

Q.

From below given colors, which colour is not present in 7 colours of rainbow?

1. Violet

2. Purple

3. Green

4. Indigo

Q.

How do water droplets acts like prism?

Q.

What is the number of reflection and refraction taking place in water droplet in a primary rainbow?

1. Reflection - 2
   Refraction - 2

2. Reflection - 1
   Refraction - 2

3. Reflection - 2
   Refraction - 1

4. Reflection - 1
   Refraction - 1

Q.

Can we also see a rainbow on a sunny day? Give situation to support your answer.

Q.

A passenger is an aeroplane will

1. never see a rainbow

2. may see a rainbow as concentric circle

3. may see a rainbow as concentric arcs

4. may see a rainbow as straight bands

Q. Why the sun should be at the back of the observer in order to see the rainbow formed? Give suitable arguments to justify this statement.

Q.

Rainbow is always formed in a direction opposite to that of the sun.

1. True

2. False

Q. The refracted rays of sunlight inside raindrops get internally reflected before coming out of the raindrop.

1. True
2. False

Q. Arrange the following colours in the increasing order of angle of deviation from a prism.

1. Red
2. Blue
3. Violet
4. Indigo
5. Green

Q. Rainbow is formed by splitting of sunlight in water droplets. There are millions of raindrops but we can see only one rainbow. Why is it so????

Q. If the shape of the rainbow is circular, why are we unable to see the whole circle?

Q.

A passenger in an airplane will

1. never see a rainbow

2. may see a rainbow as concentric circle

3. may see a rainbow as concentric arcs

4. may see a rainbow as straight bands

Q. What information do we get about sunlight from the formation of a rainbow ?

Q. How prism produces spectrum .and what happen if water droplet is circular in rainbow formation

Q. Is rainbow formed inside or outside the earth?