Light strikes a diamond (n = 2.42) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
a. 21°
b. 30°
c. 38°
d. 69°
e. 71°
a
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A wall consists of 2 layers of material: brick in front of an equal thickness of wood. If the respective thermal conductivities of the brick and wood are 1.3 J/m-s-C and 0.15 J/m-s-C,
how does the temperature gradient across the wood compare to the gradient across the brick?
How much would a teaspoon of white dwarf material weigh on Earth?
A) the same as a teaspoonful of Earthlike material B) about the same as Mt. Everest C) about the same as Earth D) a few tons E) a few million tons
The deviation of a lens from its ideal behavior is referred to as
A) spherical aberration. B) chromatic aberration. C) an aberration. D) achromatic aberration. E) None of the other choices is correct.
An example of an action at a distance force is
a. tension b. weight c. static friction d. kinetic friction e. none of the above