GRE Subject Test: Physics › Electromagnetics, Waves, and Optics
A beam of light travels through a medium with index of refraction until it reaches an interface with another material, with index of refraction
. No light is transmitted into the second material. At what angle (measured from the plane of the interface between the two materials) does the beam hit the second material?
A beam of light, with wavelength , is normally incident on a transmission diffraction grating. With respect to the incident beam, the first order diffraction maximum occurs at an angle of
. What is the number of slits per centimeter on the grating?
A car's horn has a frequency of . As the car drives away from you, you hear the horn at a frequency of
. What is the speed of the car?
A candle tall is placed
to the left of a thin convex lens with focal length
. What is the height and orientation of the image created?
What is the total resistance of a circuit containing four resistors () hooked up in series.
A reflective sphere has a diameter of . The surface of the sphere makes a convex spherical mirror; what is its focal point?
What is the total resistance of a circuit containing four resistors () hooked up in series.
A beam of unpolarized light passes through two linear polarizers whose polarization axes are at an angle theta with each other. The light initially has an intensity , and has an intensity of
after passing through both polarizes. Find
?
A reflective sphere has a diameter of . The surface of the sphere makes a convex spherical mirror; what is its focal point?
A beam of light travels through a medium with index of refraction until it reaches an interface with another material, with index of refraction
. No light is transmitted into the second material. At what angle (measured from the plane of the interface between the two materials) does the beam hit the second material?