A light ray in air is incident on an air-to-glass boundary at an angle of 33.0° and is refracted in the glass at an angle of 18.5° with the normal. Find the index of refraction of the glass
a. 1.78
b. 2.89
c. 2.95
d. 1.72
e. 1.58
d
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The intensity of solar radiation near the earth is 1.4 × 103 W/m2. What force is exerted by solar radiation impinging normally on a 5.0 m2 perfectly reflecting panel of an artificial satellite orbiting the earth?
A) 1.4 × 104 N B) 9.4 × 10-5 N C) 1.4 × 10-4 N D) 2.3 × 10-5 N E) 4.7 × 10-5 N
What is the maximum kinetic energy (in eV) of a photoelectron emitted from a surface whose work function is 5.0 eV when illuminated by a light whose wavelength is 200 nm?
a. 1.9 b. 1.2 c. 3.1 d. zero e. 6.2
Projectile Motion: A player hits a tennis ball into the air with an initial velocity of 32 m/s at 35° from the vertical. How fast is the ball moving at the highest point in its trajectory if air resistance is negligible?
Fill in the blank(s) with the appropriate word(s).
Metals are shiny because
A) they reflect 100% of incident light. B) they are poor absorbers of light. C) their electrons vibrate to the oscillations of any incident light. D) none of the above