Question

the frequency of a green light is 6×10^14hz. its wave length is
(a) 500nm (b) 5nm
(c) 5000nm (d) none​

Answer 1

Answer:

(a) 500nm

λair = 589nm = 589 x 10-9 m

Speed of light in air, c = 3 × 108 m/s

Refractive index of water μ = 1.33

The ray will reflect back in the same medium as that of incident ray.

Hence, the wavelength, speed, and frequency of the reflected ray will be the same as that of the incident ray.

Frequency of light is given by the relation,

ν = (c/λ)

= (3 x 108)/ (589 x 10-9)

= (5.09 x 1014) Hz

Hence, the speed, frequency, and wavelength of the reflected light are

× 108 m/s), (5.09 ×1014 Hz), and (589 nm) ν = 5.09 ×1014 Hz

Speed of light in water is related to the refractive index of water as:

ν = (c/ μ)

= (3 x108)/ (1.33)

= (2.26 x 108) m/s

Wavelength of light in water is given by the relation,

λ = (ν/v)

= (2.26 x 108)/ (5.09 x 1014)

=444.007 x 10-9 m

= 444.01 m

Answer 2

Answer:

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