Question

In the phenomenon of reflection
(A) velocity changes
(B) frequency changes
(C) wavelength changes
(D) phase may or may not change​

Answer 1

Answer:

i think your correct answer is B)

i hope you like this answer

Answer 2

Answer:

In the phenomenon of reflection the phase angle may or may not change i.e.option(D).

Explanation:

• Reflection is the property of light to fall on some surface and then reflect back to the same medium. Therefore, during reflection, the medium of light remains the same. Which says that the source remains the same i.e.no change in frequency. If there is a change in the source then only the frequency will change.

• In the case of reflection, the light goes back to the medium it originated from. Since the wave stays in the same medium from which it originated, the speed of the wave does not change as the refractive index remains the same. Therefore, the wavelength also remains the same.

                wavelength ( λ)=speed of light(c)/frequency(f)

• So, if the refractive index remains the same then velocity will not change as we know,

        μ=C/V

μ=refractive index

C=speed of light= 3 x $10^{8}$m/s

V=speed of light in that medium

So, the only option we are left with is (D) the phase angle may or may not change.