17.1 Understanding Diffraction and Interference
What is the distance between two slits that produce a diffraction pattern with the first minimum at an angle of 45.0° when 410-nm violet light passes through the slits?
- 2,030 nm
- 1,450 nm
- 410 nm
- 290 nm
A breakwater at the entrance to a harbor consists of a rock barrier with a 50.0 − m -wide opening. Ocean waves with a 20.0-m wavelength approach the opening straight on. At what angle to the incident direction are the boats inside the harbor most protected against wave action?
17.2 Applications of Diffraction, Interference, and Coherence
A 500-nm beam of light passing through a diffraction grating creates its second band of constructive interference at an angle of 1.50°. How far apart are the slits in the grating?
- 38,200 nm
- 19,100 nm
- 667 nm
- 333 nm
The range of the visible-light spectrum is 380 nm to 780 nm. What is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order spectrum for visible light?
- 26,300 lines/cm
- 13,200 lines/cm
- 6,410 lines/cm
- 12,820 lines/cm