Which physical quantity associated with an electromagnetic wave does n

1.	Which physical quantity associated with an electromagnetic wave does not change when it propagates from one medium into another medium?
Answer» • Velocity of sound is directly proportional to the wavelength. Thus, if the velocity of sound doubles when it travels from one medium to another, its wavelength also doubles. • The frequency of sound depends upon the source of sound, not the medium of propagation. Hence, it does not change.

Which physical quantity associated with an electromagnetic wave does not change when it propagates from one medium into another medium?

Answer»

• Velocity of sound is directly proportional to the wavelength. Thus, if the velocity of sound doubles when it travels from one medium to another, its wavelength also doubles.

• The frequency of sound depends upon the source of sound, not the medium of propagation. Hence, it does not change.

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Which physical quantity associated with an electromagnetic wave does not change when it propagates from one medium into another medium?

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