Alan places a light bulb in front of three similar cardboard pieces such that each have a hole as illustraighted in the image below.
He can't see the candle from the other side of the cardboard C because of:

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Reflection of light.

Refraction of light.

Scattering of light.

Rectilinear propagation of light.

answer is D.

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Detailed Solution

The bulb cannot be seen from the other side of cardboard C because the light travels in a straight line. Which is also called rectilinear propagation of light.
Since the holes made in the cardboards are not in a straight line, the light will not be able to pass through all the cardboard.

Therefore, 'Rectilinear propagation of light' is the correct response.

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