Suppose that you take the lenses out of a pair of polarized sunglasses and place one on top of the other. Rotate one lens 90° with respect to the normal position of the other lens
Early in the morning, look directly overhead at the sunlight coming down. What would you see? A) The lenses would look completely dark, since they would transmit no light.
B) You would see some light, and the brightness would be a function of how the lenses were oriented with respect to the incoming light.
C) You would see light with intensity reduced to about 50% of what it would be with one lens.
D) You would see some light, and the intensity would be the same as if you had looked through only one lens.
E) You would see some light, and the intensity would be greater than if you looked through only one lens.
A
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Fill in the blank(s) with the appropriate word(s).
When a large galaxy collides with a small galaxy, the smaller galaxy may be pulled apart by tidal forces
Indicate whether the statement is true or false
The main lens or mirror of a telescope is called the ____________________
Fill in the blank(s) with correct word
A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our sun
If that star has 4 times the mass of our sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period? A) four times as much B) one-half as much C) one-fourth as much D) twice as much E) times as much