Professor C.V Raman surprised his students by suspending freely a tiny light ball in a transparent vacuum chamber by shining a laser beam on it. Which property of EM waves was he exhibiting?
Give one more example of this property.

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Solution

Electromagnetic waves carry energy and momentum. Since electromagnetic waves carry momentum, when they hit a surface they transfer this momentum to the surface, causing the momentum to change, which produces force or pressure called radiation pressure.
Tails of comets are due to solar radiation.

Final answer: Radiation pressure.

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