Which ray diagrams are correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens
a.
B and C
b.
C and D
c.
D and E
d.
C and E
e.
C, D and E
e
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According to current understanding, which of the following is required in order for a planet to have rings?
A) The planet must orbit its star at a distance greater than Mars orbits the Sun. B) The planet must have many small moons that orbit relatively close to the planet in its equatorial plane. C) The planet must once have had a large moon that came too close to it, shattering the moon and creating the ring particles. D) The planet must be at least as massive as Saturn.
Which type of weather is characterized by spiral storms with winds of up to 300 km/hour?
A) hurricanes B) tornadoes C) tropical depressions D) tropical storms
Which portion of the electromagnetic spectrum is used to identify fluorescent minerals?
a. ultraviolet light b. X rays c. infrared waves d. gamma rays
Why do astronomers believe that galactic collisions cause active galactic nuclei?
What will be an ideal response?