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Neetoo

Answer:

Frequency of light is 0.701×10¹⁵ Hz

Explanation:

Given data:

Frequency of light = ?

wavelength of light = 4.28×10⁻⁷m

Solution:

Formula:

Speed of light = wavelength × frequency

c = λ × f

f = c/λ

This formula shows that both are inversely related to each other.

The speed of light is 3×10⁸ m/s

Frequency is taken in Hz.

It is the number of oscillations, wave of light make in one second.

Wavelength is designated as "λ" and it is the measured in meter. It is the distance between the two crust of two trough.

Now we will put the values in formula.

f = 3×10⁸ m/s / 4.28×10⁻⁷m

f = 0.701×10¹⁵ s⁻¹

s⁻¹  = Hz

f = 0.701×10¹⁵ Hz