What happens to the intensity of light when it passes through two polarizers ali

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Question: What happens to the intensity of light when it passes through two polarizers aligned at 90 degrees to each other?

Options:

Correct Answer: It becomes zero

Solution:

When light passes through two polarizers at 90 degrees to each other, the intensity becomes zero because no light can pass through.

What happens to the intensity of light when it passes through two polarizers aligned at 90 degrees to each other?

What happens to the intensity of light when it passes through two polarizers aligned at 90 degrees to each other?

Step 1: Understand what a polarizer is. A polarizer is a filter that allows light waves of a certain orientation to pass through while blocking others.
Step 2: Know that unpolarized light (like sunlight) has waves vibrating in all directions.
Step 3: When unpolarized light hits the first polarizer, it only allows the light waves that are aligned with its orientation to pass through. This reduces the intensity of the light.
Step 4: The light that comes out of the first polarizer is now polarized, meaning it vibrates in one direction only.
Step 5: Now, this polarized light hits the second polarizer, which is oriented at 90 degrees to the first one.
Step 6: Since the light from the first polarizer is vibrating in one direction and the second polarizer is blocking that direction (because they are at 90 degrees), no light can pass through the second polarizer.
Step 7: Therefore, the intensity of the light after passing through both polarizers becomes zero.

Polarization of Light – Understanding how polarizers work and how they affect the intensity of light.
Malus's Law – The principle that describes the intensity of light passing through polarizers based on their alignment.