Question

Light waves are traveling through glass. If the wavelength of some part of the light wave is 4 x 10^(-7) m and the frequency of that light is 5 x 10^(14) Hz, what is the speed of light through the glass?

8 x 10^(-22) m/s
1.25 x 10^21 m/s
1 x 10^7 m/s
2 x 10^8 m/s

Answer 1

The speed of light through glass is calculated by multiplying the wavelength (4 x 10^(-7) m) by the frequency (5 x 10^(14) Hz), which equals 2 x 10^8 m/s.

Step-by-step explanation:

To find the speed of light through glass, we can use the relationship between wavelength (λ), frequency (f), and speed (c): c = fλ. Given that the wavelength of the light wave is 4 x 10(-7) m and the frequency is 5 x 10(14) Hz, we can calculate the speed of light in glass as follows:

c = fλ
= (5 x 10(14) Hz) × (4 x 10(-7) m)
= 2 x 108 m/s

Thus, the correct answer is 2 x 108 m/s.

Answer 2

Wave speed = fλ
=(5 x 10^14)(4 x 10^-7)
=2 x 10^8

Where f is the frequency and λ is the wavelength