Question

While passing light through crystals recently the scientists spotted an unexpected new property of light, which is based on the concept called 'angular momentum'. Consider the following statements about the sound waves:

Which of the above statement(s) is/are correct?

• A. Only 1 & 2
• B. Only 2 & 3
• C. Only 2
• D. All of the above

Answer 1

The correct option is C Only 2

If the frequency of a sound wave is reduced to half of its original value, then the speed of sound wave will reduce to half of its original value.
$frequency=\frac{speedofsound}{\lambda }\lambda =\frac{speedofsound}{frequency}$

Sound waves Light Waves
Travel with a speed of 332 m/s at O C Travel with a speed of $3\times 108$ m/s
Require a medium Do not require a medium
Are longitudinal waves consisting Are electromagnetic waves consisting of varing electric and magnetic fields
compressions and rarefactons
Are of different frequencies, giving notes Are of different frequencies, resulting in different colours
of different pitches