A laser light of wavelength 500 nm falls on a diffraction grating that has 2500 slits/cm. What is the slit spacing?

A

Explanation:

Given that the diffraction grating has 2500 slits/cm

And the wavelength of light = 500nm

The wavelength of light has no effect on the calculation of the split spacing in this question. So,

The slit spacing will be :

Slit in m ÷ number of slits

Slit spacing = 0.01/2500

Slit spacing = 4 × 10^-6 m

Therefore, option A is the correct answer.

For this case we must convert 26 seconds to hours,

By definition we have to:

1 hour equals 3600 seconds.

So, if we propose a rule of three we have:

1 hour ----------> 3600 seconds

x ------------------> 26 seconds

Where the variable "x" represents the number of hours equivalent to 26 seconds:

Thus, 26 seconds equals approximately 0.0072 hours.

0.0072 hours