Chapter 24 & 25

Geometrical Optics &
Physical Optics

 

Diffraction Gratings

 

Principal Maxima:

(17)

where d is the separation between lines and

 

Example 25

Find the slit spacing necessary for 450 nm light to have a first order (m = 1) principal maximum at 15°.

 

Solution:

 

 

Example 26

When 546 nm light passes through a particular diffraction grating, a second order principal maximum is observed at an angle of 16°. How many lines per centimeter does this grating have?

 

 

Solution:

Calculate d:

Convert to centimeters:

Find the inverse:

 

Holography

 

The End