Home
Class 10
PHYSICS
In the formation of a rainbow light from...

In the formation of a rainbow light from the sun on water droplets undergoes

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

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question regarding the formation of a rainbow and the processes involved when sunlight interacts with water droplets, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Phenomenon**: A rainbow is formed when sunlight passes through water droplets in the atmosphere after rain. The light from the sun is white light, which is a mixture of various colors. 2. **Dispersion of Light**: When the white light enters a water droplet, it slows down and bends due to the change in medium (from air to water). This bending of light is called refraction. As the light refracts, it splits into its constituent colors (red, orange, yellow, green, blue, indigo, violet) due to different wavelengths bending by different amounts. This process is known as dispersion. 3. **Total Internal Reflection**: After dispersion, the light travels within the droplet and reaches the inner surface. If the angle of incidence is greater than the critical angle, the light does not exit the droplet but reflects back inside. This phenomenon is called total internal reflection. 4. **Emergence of Colors**: The light then refracts again as it exits the droplet into the air. This second refraction causes the colors to spread out further, resulting in the formation of a circular arc of colors that we perceive as a rainbow. 5. **Conclusion**: Therefore, both dispersion and total internal reflection are essential processes in the formation of a rainbow. The correct answer to the question is that light from the sun on water droplets undergoes both dispersion and total internal reflection. ### Final Answer: In the formation of a rainbow, light from the sun on water droplets undergoes **dispersion and total internal reflection both**. ---
To answer the question regarding the formation of a rainbow and the processes involved when sunlight interacts with water droplets, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Phenomenon**: A rainbow is formed when sunlight passes through water droplets in the atmosphere after rain. The light from the sun is white light, which is a mixture of various colors. 2. **Dispersion of Light**: When the white light enters a water droplet, it slows down and bends due to the change in medium (from air to water). This bending of light is called refraction. As the light refracts, it splits into its constituent colors (red, orange, yellow, green, blue, indigo, violet) due to different wavelengths bending by different amounts. This process is known as dispersion. ...
Promotional Banner

Topper's Solved these Questions

  • THE HUMAN EYE AND THE COLOURFUL WORLD

    NCERT EXEMPLAR ENGLISH|Exercise SHORT ANSWER TYPE QUESTIONS|10 Videos

  • THE HUMAN EYE AND THE COLOURFUL WORLD

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER TYPE QUESTIONS|6 Videos

  • SOURCES OF ENERGY

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER TYPE QUESTIONS|7 Videos

Similar Questions

Explore conceptually related problems

The rays from the sun are considered to be

During formation of pollen grains, a microspore mother cell undergoes

It takes time 8 min for light to reach from the sun to the earth surface. If speed of light is taken to be 3 xx 10^8 m s^(-1) , find the distance from the sun to the earth in km.

Assertion : The rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere. Reason : No reflection or refraction of light is involved in the formation of rainbow.

When light enters from air to water, then its

State whether the following statements are true or false. If false, rewrite the correct form of the statement by changing the first word only: Guttation is the loss of water in the form of water droplets from hydathodes.

A point source of light is placed at a depth of h below the surface of water of refractive index mu . A floating opaque disc is placed on the surface of water so that light from the source is not visible from the surface. The minimum diameter of the disc is

A ray of sunlight enters a spherical water droplet (n=4//3) at an angle of incidence 53^(@) measured with respect to the normal to the surface.It is reflected from the back surface of the droplet and re-enters into air.The angle between the incoming and outgoing ray is [Take sin53^(@)=0.8 ]

Light from the sun reaches the earth approximately in