GRE Subject Test: Physics - Waves

1

A beam of light, with wavelength $400\textup{ nm}$ , is normally incident on a transmission diffraction grating. With respect to the incident beam, the first order diffraction maximum occurs at an angle of $6^\circ$ . What is the number of slits per centimeter on the grating?

2

A beam of light, with wavelength $400\textup{ nm}$ , is normally incident on a transmission diffraction grating. With respect to the incident beam, the first order diffraction maximum occurs at an angle of $6^\circ$ . What is the number of slits per centimeter on the grating?

3

A car's horn has a frequency of $439\textup{ Hz}$ . As the car drives away from you, you hear the horn at a frequency of $384\textup{ Hz}$ . What is the speed of the car?

$v_{sound}=343\ \frac{\textup{m}}{\textup{s}}$

4

A double slit experiment is set up with the following parameters: two slits are a separated by a distance . A beam of light with wavelength $\lambda$ shines through the two slits, and is projected onto a screen a distance from the slits. What is the distance on the screen between the central band and the next band on either side? (This distance is marked '' on the figure).

Slit

5

A double slit experiment is set up with the following parameters: two slits are a separated by a distance . A beam of light with wavelength $\lambda$ shines through the two slits, and is projected onto a screen a distance from the slits. What is the distance on the screen between the central band and the next band on either side? (This distance is marked '' on the figure).

Slit

6

A car's horn has a frequency of $439\textup{ Hz}$ . As the car drives away from you, you hear the horn at a frequency of $384\textup{ Hz}$ . What is the speed of the car?

$v_{sound}=343\ \frac{\textup{m}}{\textup{s}}$

7

Two waves with frequencies: $f_1=6 \textup{ MHz}, \ f_2=2 \textup{ MHz}$ are combined. What is the frequency of the resulting beat?

8

A monochromatic beam of $600\textup{ nm}$ light travels through a material with a phase velocity of $2*10^8\ \frac{\textup{m}}{\textup{s}}$ . What is the refractive index of the material?

9

Two waves with frequencies: $f_1=6 \textup{ MHz}, \ f_2=2 \textup{ MHz}$ are combined. What is the frequency of the resulting beat?

10

A monochromatic beam of $600\textup{ nm}$ light travels through a material with a phase velocity of $2*10^8\ \frac{\textup{m}}{\textup{s}}$ . What is the refractive index of the material?

Waves

Practice Questions