Lesson: Diffraction Gratings
In this lesson, we will learn how to calculate the characteristics of an interference pattern produced by visible light incident on a diffraction grating.
Sample Question Videos
Worksheet: 25 Questions • 1 Video
A hydrogen gas discharge lamp emits visible light at wavelength . Light from this lamp falls on a diffraction grating with a slit separation of 0.0250 mm. How far from the central maximum is the third maxima when viewed on a screen 2.00 m from the slits?
A hydrogen gas discharge lamp emits visible light at wavelength . Light from this lamp falls on a diffraction grating that has a slit separation of 0.025 mm. By what distance are the second and third maxima separated when viewed on a screen 2.0 m from the slits?
A laser beam shining light of wavelength 632.8 nm is reflected from the surface of a CD onto a wall. The brightest spot on the wall is from the reflected beam, at an angle equal to the angle of incidence of laser light onto the CD, but a fringe pattern is also observed. The wall is 1.50 m from the CD, and the first fringe is 0.600 m from the central maximum. What is the spacing of grooves on the CD?