Class 7 Light CH-8 Quiz
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Class 7 Light CH-8 Quiz

Test your knowledge of the study topic CH-8 light class 7 with questions about opaque objects and the behavior of light passing through a prism.

Created by
@VigilantProsperity

Questions and Answers

What is the study topic of CH-8 light class 7?

Light

Which of the following is an example of opaque object?

Wood

What happens when light passes through a prism?

It bends or refracts

What is the main reason for the formation of a rainbow?

<p>Dispersion</p> Signup and view all the answers

In the context of light, what is the phenomenon responsible for the sky appearing blue?

<p>Scattering</p> Signup and view all the answers

What property of an object determines its color when illuminated by white light?

<p>Reflectivity</p> Signup and view all the answers

What phenomenon is responsible for the separation of white light into its constituent colors when it passes through a prism?

<p>Dispersion</p> Signup and view all the answers

In the context of light, which property of an object determines the color that is perceived when it is illuminated by white light?

<p>Reflectance spectrum</p> Signup and view all the answers

What is the main reason behind the blue color of the sky, as observed in the context of light?

<p>Rayleigh scattering</p> Signup and view all the answers

Study Notes

Light Class 7

  • CH-8 is the study topic of Light in Class 7. ###Opaque Objects
  • An example of an opaque object is a book, which does not allow light to pass through it.

Refraction and Dispersion

  • When light passes through a prism, it undergoes refraction and dispersion, separating into its constituent colors.

Rainbow Formation

  • The main reason for the formation of a rainbow is the refraction and dispersion of sunlight as it passes through water droplets in the air.

Color Perception

  • The color of an object, when illuminated by white light, is determined by its property of selective absorption, where it absorbs certain wavelengths and reflects others.

Dispersion of Light

  • The phenomenon responsible for the separation of white light into its constituent colors when it passes through a prism is dispersion.

Sky Color

  • The blue color of the sky is due to the scattering of shorter (blue) wavelengths of light by the tiny molecules of gases in the atmosphere, a phenomenon known as Rayleigh scattering.

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