Question

Radio waves are typically used for communication because they have such low energy, and thus won't hurt living objects when they come in contact with them. A radio wave has a wavelength of 0.349 m. What is the energy of one photon of this radiation? >10-15 j 1.7x10-16) 2.3x10-34 ) 5.7x10-25) 7.7x10-43)

Answer 1

d option ( 5.7 * 10^-25 J ) is correct option.

explanation is shown below-

The energy of one photon is =hv

Where h = Planck's constant = 6.62* 10^-34 JS

, v = frequency

Also , frequency V = C/l = speed of light / wavelength

Therefore, energy of photon E = hc/l

= 6.62*10^ -34 JS * 3*10^8 m/s / 0.349 m

= 56.905 * 10-26 J

=5.69 * 10^-25 J

=5.7 *10^-25 J.