Which is a useful property of a prism?
A) internally reflects 100% of incident light
B) changes directions of light in a variety of ways
C) re-inverts images
D) all the above
E) none of the above
Answer: D
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The nearest star is 1 ly from the solar system
Indicate whether the statement is true or false
If the distance from the Sun to the Earth is represented by roughly 15 meters, then the distance from Earth to the Moon on the same scale would be
a. about 30 meters. b. about 10 meters. c. about 1 meter. d. small than your hand.
Like the Sun and the Moon, the stars appear to move from west to east from one day to the next
Indicate whether the statement is true or false
The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. According to this equation, if the distance between two objects increases, what happens to the gravitational force between them?
A) The force increases. B) The force decreases. C) The force drops instantly to zero. D) The gravitational force is not affected by distance.