Question

When the traveling mirror of a Michelson interferometer is moved 2.40×10−5m, 90 fringes pass by a point on the observation screen. What is the wavelength of the light used?

Answer 1

To calculate the wavelength of the light used in a Michelson interferometer, use the formula λ = d / n, where d is the distance moved by the mirror and n is the number of fringes. In this case, the wavelength of the light used is 2.67×10−7m.

Step-by-step explanation:

To calculate the wavelength of the light used in a Michelson interferometer, we can use the formula:

Wavelength (λ) = Distance moved by mirror (d) / Number of fringes (n)

In this case, the mirror is moved 2.40×10−5m, and 90 fringes pass by a point on the observation screen. Plugging in these values, we get:

λ = (2.40×10−5m) / 90 = 2.67×10−7m

Therefore, the wavelength of the light used is 2.67×10−7m.