Podcast
Questions and Answers
What is the study topic of CH-8 light class 7?
What is the study topic of CH-8 light class 7?
- Sound waves
- Magnetism
- Electricity
- Light (correct)
Which of the following is an example of opaque object?
Which of the following is an example of opaque object?
- Plastic wrap
- Glass
- Aluminum foil
- Wood (correct)
What happens when light passes through a prism?
What happens when light passes through a prism?
- It slows down
- It bends or refracts (correct)
- It becomes warmer
- It becomes brighter
What is the main reason for the formation of a rainbow?
What is the main reason for the formation of a rainbow?
In the context of light, what is the phenomenon responsible for the sky appearing blue?
In the context of light, what is the phenomenon responsible for the sky appearing blue?
What property of an object determines its color when illuminated by white light?
What property of an object determines its color when illuminated by white light?
What phenomenon is responsible for the separation of white light into its constituent colors when it passes through a prism?
What phenomenon is responsible for the separation of white light into its constituent colors when it passes through a prism?
In the context of light, which property of an object determines the color that is perceived when it is illuminated by white light?
In the context of light, which property of an object determines the color that is perceived when it is illuminated by white light?
What is the main reason behind the blue color of the sky, as observed in the context of light?
What is the main reason behind the blue color of the sky, as observed in the context of light?
Flashcards
CH-8 Light Study Topic?
CH-8 Light Study Topic?
The study of light and its properties.
Opaque Object Example?
Opaque Object Example?
An object that does not allow light to pass through it.
Light Through a Prism?
Light Through a Prism?
It bends, separating into different colors.
Rainbow Formation Reason?
Rainbow Formation Reason?
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Sky's Blue Color?
Sky's Blue Color?
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Object's Color?
Object's Color?
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Dispersion?
Dispersion?
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Reflectance Spectrum?
Reflectance Spectrum?
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Rayleigh Scattering?
Rayleigh Scattering?
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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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