Answer:
Electromagnetic wave has longer wavelength.
Explanation:
The velocity (v) of a wave is the product between frequency (f) and wavelength (λ):
(1)
Electromagnetic waves travel on air near the velocity of light , and sound waves travel on air at approximately
, so if the frequency is equal for both, and the velocity is directly proportional to wavelength as shown in (1) then higher velocities imply higher wavelengths, that is, electromagnetic wave has longer wavelength.
As we know by work energy theorem
total work done = change in kinetic energy
so here we can say that wok done on the box will be equal to the change in kinetic energy of the system
initial the box is at rest at position x = x1
so initial kinetic energy will be ZERO
at final position x = x2 final kinetic energy is given as
now work done is given as
so we can say
so above is the work done on the box to slide it from x1 to x2