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Choose the correct alternative...

Choose the correct alternative

A

When plane polarised light passes through polaroid, it changes it changes its nature to linearly polarised

B

Refracted light, when light is incident at Brewster angle, in linearly polarised

C

Polarised light can be produced by scattering through `pi/2` in earth's atmosphere

D

Natural light from sun is polarised

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each option provided and determine which one is correct regarding the properties of polarized light. ### Step-by-Step Solution: 1. **Understanding Option 1**: - The statement claims that when plane polarized light is passed through a Polaroid, it changes its nature to linearly polarized light. - **Analysis**: This is incorrect. Plane polarized light remains plane polarized after passing through a Polaroid. The correct terminology is that Polaroid filters produce plane polarized light from unpolarized light, not linearly polarized light. - **Conclusion**: Option 1 is incorrect. 2. **Understanding Option 2**: - The statement mentions that when light is incident at Brewster's Angle, the reflected ray is plane-polarized. - **Analysis**: This is also incorrect as it refers to the reflected light being linearly polarized, which is a specific case of plane polarization. However, the terminology used here is misleading. - **Conclusion**: Option 2 is incorrect. 3. **Understanding Option 3**: - The statement claims that plane-polarized light can be produced by scattering through π/2 in Earth's atmosphere. - **Analysis**: This is correct. When light scatters at an angle of π/2 (90 degrees), it results in polarized light due to the scattering process, which is a known phenomenon in atmospheric physics. - **Conclusion**: Option 3 is correct. 4. **Understanding Option 4**: - The statement asserts that natural light is polarized. - **Analysis**: This is incorrect. Natural light is typically unpolarized, meaning it propagates in multiple planes and does not have a preferred direction of polarization. - **Conclusion**: Option 4 is incorrect. ### Final Answer: The correct alternative is **Option 3**. ---
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