A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely
a. a small-diameter reflecting telescope.
b. a small-diameter refracting telescope.
c. a large-diameter refracting telescope.
d. a large-diameter reflecting telescope.
e. an infrared telescope.
b
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Based on evidence from measurements of the acceleration of the expansion rate and from careful study of the cosmic microwave background, about what percentage of the universe's total mass and energy takes the form of ordinary atomic matter (protons, neutrons, and electrons)?
A) 5% B) 0.5% C) 27% D) 68%
A photon of wavelength 18.0 pm is scattered through an angle of 120° by a stationary electron. What is the wavelength of the scattered photon? (mel = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s)
A) 19.2 pm B) 20.4 pm C) 21.6 pm D) 22.9 pm E) 24.1 pm
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What will be an ideal response?
Species are groups of organisms
A) with a common ancestor B) that are genetically distinct C) that look similar D) that are capable of interbreeding with one another