Direction: In the Following Questions, A Statement of Assertion (A) I...
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). During the day time, sky appears blue. This is because the size of the particles in the atmosphere is smaller than the wavelength of visible light, so they scatter the light of shorter wavelengths. The scatter blue light enters our eye.
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Direction: In the Following Questions, A Statement of Assertion (A) I...
Assertion: The blue color of the sky appears due to scattering of blue color.
Reason: Blue color has the shortest wavelength in the visible spectrum.
The correct answer is option 'A' - Both assertion (A) and reason (R) are true, and reason (R) is the correct explanation of assertion (A).
Explanation:
Scattering of Light:
- Scattering is the phenomenon where the light gets deviated from its straight path while passing through a medium.
- The scattering of light occurs due to the interaction of light with particles or molecules present in the atmosphere.
Reason for the Blue Color of the Sky:
- The blue color of the sky is mainly due to the scattering of sunlight by the molecules in the Earth's atmosphere.
- When sunlight passes through the atmosphere, it interacts with the molecules present in the air, such as nitrogen and oxygen.
- These molecules scatter the sunlight in all directions.
- However, the scattering of shorter wavelength light (blue and violet) is more intense compared to longer wavelength light (red and orange).
- As a result, the blue and violet light scatters more and is visible to our eyes, giving the sky its blue color.
Explanation of the Reason:
- The reason provided in the statement is correct. Blue color does have the shortest wavelength in the visible spectrum.
- In the visible spectrum, light with shorter wavelength appears bluish, while light with longer wavelength appears reddish.
- The wavelength of blue light is around 400-500 nanometers, which is shorter compared to other colors in the visible spectrum.
- Due to its shorter wavelength, blue light scatters more easily when it interacts with the particles in the atmosphere.
- This scattering of blue light is responsible for the blue color of the sky.
Therefore, both the assertion and the reason are true, and the reason correctly explains why the sky appears blue.
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