Dispersion of White Light by Glass Prism

Q.

What do you understand by the term spectrum ? Name the various colours present in the spectrum of sunlight.

Q.

What is spectrum of light?

Q. What is the middlemost colour in the spectrum of light formed by a prism?

1. Yellow
2. Green
3. Indigo
4. Blue

Q. Why does dispersion not occur in a glass slab?

Q.

How is Rainbow formed? [2 MARKS]

Q.

A light ray of green colour is passed through a prism. Will it undergo dispersion?Explain.

Q. What is visible light?

Q.

why does dispersion of light takes place

Q.

Will a spectrum be formed if a Ray of monochromatic light falls on a prism ? Explain

Q. A rainbow is formed when tiny drops of water suspended in the air act as:

1. Opaque object
2. Mirror
3. Prism
4. Rectangular glass slab

Q.

While playing with prisms, Sushweta arranged three prisms as shown below ($2^{nd}$ prism inverted with respect to the other two) and made sunlight fall on the $1^{st}$ prism.

The colour(s) she would observe in regions A, B and C are respectively:

1. Band of 7 colors, Band of 7 colors, White light

2. White light, Band of 7 colors, White light

3. Band of 7 colors, White light, Band of 7 colors

4. Band of 7 colors, Band of 7 colors, Band of 7 colors

Q.

Why does the white light split on the first refracting face of prism ?

Q. Please elaborate difference between refraction through prism and refraction through glass slab.

Q. Question 8
Which of the following statements is correct regarding the propagation of light of different colours of white light in air?

(a) Red light moves fastest
(b) Blue light moves faster than green light
(c) All the colours of the white light move with the same speed
(d) Yellow light moves with the mean speed as that of the red and the violet light

Q. $\text{AB}$ is a white light ray incident on the prism $\text{PQR}$ as shown below.
Complete the ray diagram when the light passes through it and falls on the adjacent screen.

1. 
2. 
3. 
4. 

Q.

What do you mean by the term dispersion ?

Q.

If white light passes through prism, we will see a spectrum. What will happen if a red or blue light will fall on a prism

Q.

In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.

Q.

Suppose a red coloured ball is placed in the blue light what colour will you observe

Q.

What is the speed of light in vacuum? Mention a condition in which the speed of light changes.

Q. What is dispersion of light?

Q. Which of the following does not disperse the white light into its components?

1. Prism
2. Rectangular glass slab
3. Water droplets
4. None of these

Q. Why does the speed of light of all colors is different in the same medium

Q. Which of the following colours of light will have the maximum speed in a glass slab?

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

Q. Define dispersion of light.

Q.

Sunlight comprises ______________ colours.

Q.

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

1. interference

2. dispersion

3. reflection

4. refraction

Q. What is the thing in the prism that splits it into seven colours?

Q.

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

1. interference

2. refraction

3. dispersion

4. reflection

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

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