Dispersion of Light

Q.

What is the colour of sun?

Q.

How can you show that white light (say, sunlight) consists of seven colours?

Q.

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

Q.

What happens when white light passes through a glass prism?

Q. Explain Dispersion of light.

Q.

What is meant by 'dispersion of light '? Name a natural phenomenon which is caused by the dispersion of sunlight in the sky.

Q.

What colors make up the spectrum of white light?

Q.

When light rays are passed through a prism, the phenomenon that occurs is known as ___________ of light.

1. diffraction

2. scattering

3. reflection

4. dispersion

Q. The phenomenon of splitting of white light into its constituent colours is known as:

1. regular reflection
2. dispersion
3. refraction
4. diffused reflection

Q. Who invented prism

Q.

Why do we need a prism for the dispersion of light?

Q.

What happens when a beam of sunlight is passed through a glass prism ?

Q. Newton's disc is made up of ____ colors.

1. 4
2. 6
3. 3
4. 7

Q.

What do you understand by a source of light?

Q.

3 Give scientific reason:

​​​​​(A) object appear coloured when viewed through a prism

Q. why the sky is blue in colour?

Q. Why is the shape of the rainbow round?

Q.

An optical instrument which can split white light into seven different colors is known as

___

Q.

You are given a dise divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly ?

Q.

We use flint glass prism to disperse polychromatic light because light of different colors:

1. Travel with same speed

2. Travel with same speed but deviate differently due to the shape of the prism

3. Have different anisotropic properties while travelling through prism

4. Travel with different speeds

Q.

Which is most visible color and which is the least visible color(not invisible)?

Q.

Give Reason:
The sunlight after passing through a prism splits into seven colours.

Q. Sun in orange colour but rainbow is caused by dispersion so the white light produced from sun should be in white and the sun also should be in white colour

Q.

A hollow glass prism does not give spectrum when light passed through it. Explain.

Q. Four different colours of light red, yellow, blue, and violet are incident on a prism at the same angle. The order of the angles of emergence will be:

1. $\text{red}>\text{blue}>\text{yellow}>\text{violet}$
2. $\text{red}<\text{blue}<\text{yellow}<\text{violet}$
3. $\text{red}<\text{blue}>\text{yellow}<\text{violet}$
4. $\text{violet}>\text{blue}>\text{yellow}>\text{red}$

Q.

The splitting of white light into seven colours is known as ___.

1. reflection

2. refraction

3. interference

4. dispersion

Q.

Statement 1: When white light ray passes through a prism it disperses into seven different colours this phenomenon is called dispersion.

Statement 2: Refraction depends on upon the wavelength of light and since different colours have different wavelengths hence are refracted at the different angle and so they are split into the colour spectrum.

1. Statement 1 and 2 are correct but statement 2 is not the reason for statement 1
2. Statement 1 and 2 are correct and statement 2 is the correct reason for statement 1
3. Both statements are wrong
4. Statement 1 is correct but statement 2 is incorrect

Q. Which among the following can we use to see the spectrum of visible light?

1. Prism
2. Glass cube
3. Plane mirror
4. Spherical mirrors

Q.

Explain the reason for the given statement. “Light of different colors is deviated through different angles by a prism”.

Q.

Why sky looks blue to us?