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Questions and Answers
What is the study topic of CH-8 light class 7?
Which of the following is an example of opaque object?
What happens when light passes through a prism?
What is the main reason for the formation of a rainbow?
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In the context of light, what is the phenomenon responsible for the sky appearing blue?
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What property of an object determines its color when illuminated by white light?
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What phenomenon is responsible for the separation of white light into its constituent colors when it passes through a prism?
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In the context of light, which property of an object determines the color that is perceived when it is illuminated by white light?
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What is the main reason behind the blue color of the sky, as observed in the context of light?
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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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Description
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.
