An opaque material that blocks light
A. Circadian Rhythm
B. Glare
C. Vincent Van Gogh
D. International Dark-Sky Association
E. Shielding
F. Sky Glow
E. Shielding
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Which of the following never goes in retrograde motion?
A) Mars B) Jupiter C) the Sun D) Saturn E) Venus
A quantity that has both a magnitude and direction associated with it is called a __________
Fill in the blank(s) with correct word
Full Moon always occurs
a. on the 15th of ever month. b. when the Moon is at right angles to the direction of the Sun. c. when the Moon is closer to Sun than the Earth is. d. when the Moon is directly opposite the position of the Sun.
Resolution: A camera used for aerial mapping has a lens with a 30-cm diameter maximum aperture and a 42-cm focal length. Light of 550 nm wavelength is used to form the image. Assuming that the resolution of the camera is limited only by diffraction, what is the smallest angle (in milliradians) subtended by an object on the ground that can be resolved by this camera at maximum aperture?
A. 1.6 mrad B. 2.2 mrad C. 3.2 mrad D. 4.5 mrad E. 6.3 mrad