In an experiment to measure the speed of light by Fizeau’s apparatus, following data are used: Distance between the mirrors=12.0 km, Number of teeth in the wheel=180. Find the minimum angular speed of the wheel for which the image is not seen.

Question

Philoid · Accepted Answer

Given: Fizeau’s apparatus,

Distance between the mirrors = 12.0 km = 12×10³ m

Number of teeth in the wheel, n = 180

Speed of light = 3×10⁸ ms^-1

According to Fizeau’s apparatus,

Therefore,

Converting radians to degrees

Hence, the minimum angular speed of the wheel is ω = 1.25×10⁴ degree/s for which the image is not seen.

In an experiment to measure the speed oflight by Fizeau’s apparatus, following data are used:Distance between the mirrors=12.0 km,Number of teeth in the wheel=180.Find the minimum angular speed of the wheel for which the image is not seen.

In an experiment to measure the speed of
light by Fizeau’s apparatus, following data are used:

Distance between the mirrors=12.0 km,

Number of teeth in the wheel=180.

Find the minimum angular speed of the wheel for which the image is not seen.