Formation of Rainbows

Q.

Rainbows are formed due to

A) Refraction, reflection and dispersion of light by raindrops.

B) Reflection of light from rivers and ocean.

C) Refraction and reflection of light by Clouds.

D) Only the refraction of light by raindrops.

Q. Why do we see a rainbow in the sky only after rainfall?

Q. A rainbow is caused by

1. reflection
2. refraction
3. dispersion
4. tyndall effect

Q. What is the actual shape of a rainbow?

1. Spherical
2. Hemispherical
3. Conical
4. Cylindrical

Q. If total internal reflection takes place only when light ray moves from optical denser to optical rarer...
But during rainbow formation total internal reflection takes place when light enters from air to a water drop that is from rarer medium to denser medium which is the exact converse...
what is it happening this way.?

Q.

Why rainbow always appears in opposite direction of the sun

Q.

A particular colour in the rainbow makes an angle of ${42.7}^{\circ }$ with the line of vision. Identify the colour?

1. Violet

2. Red

3. Green

4. Yellow

Q.

Where in the sky would you expect to see a rainbow in the evening?

1. Northern Sky
2. Southern Sky
3. Eastern Sky
4. Western Sky

Q. Two plane mirrors are inclined to each other at an angle of ${55}^{\circ }$ as shown in figure. A ray of light PO incident at some angle i on the mirror $M_1$ falls after reflection from it, on the other mirror $M_2$ from which it gets reflected along a direction parallel to the plane mirror $M_1.$ Find the value of i.

1. ${45}^o$
2. ${100}^o$
3. ${70}^o$
4. ${120}^o$

Q.

A thick glass slab with a silvered side forms multiple images on account of

1. reflection of light

2. dispersion of light

3. refraction of light

4. both reflection and refraction of light

Q.

Rainbow is formed due to sunlight getting dispersed and internally reflected inside raindrops.

1. True

2. False

Q.

What is a totally reflecting prism ?

Q.

If magenta light falls on a cyan object, what colour will the object appear to be and why?

Q. If Ram is facing west and sees a rainbow in front of him, then in which direction is the sun?

1. North
2. South
3. East
4. West

Q.

Why do we see rainbow on the other side of the sun?(3 marks)

Q.

Rainbows are formed due to ________.

1. only the refraction of light by raindrops

2. refraction, total internal reflection and dispersion of light by raindrops

3. reflection of light from rivers and ocean

4. refraction andreflection of light by clouds

Q. Among the following which part of spectrum of white light produces maximum visibility:

1. Red
2. Yellow
3. Yellow green
4. Blue

Q.

The following diagrams show the splitting up of a composite light into its constituent colours.

Which among the above figures is correct?

1. (i)

2. (ii)

3. (iii)

4. both (iii) and (i)

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 - 2
   Refraction - 1

3. Reflection - 1
   Refraction - 2

4. Reflection - 1
   Refraction - 1

Q. The shape of a rainbow when viewed from an aircraft flying very high is .

1. Hemisphere
2. Circle
3. Arc

Q. Why do we see a rainbow in the sky only after rainfall?

Q.

If Ram is facing west and he sees a rainbow in front of him then, in which direction most probably the Sun is?

1. North

2. South

3. West

4. East

Q.

Colour of sunlight is?

1. orange

2. yellow

3. red

4. white

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

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

Q.

what is light and what is its nature

Q.

give the essential condition to see rainbow

Q.

what is light and what is its nature

Q.

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

1. True

2. False

Q. The actual shape of a rainbow is .

1. Hemispherical
2. Spherical
3. Conical

Q.

In which of the following, scattering of light does not takes place?

1. Blue colour of the sky

2. Colour of deep sea

3. Reddening of the sun

4. Rainbow