Consider a converging lens forming an image on a screen. What property of the image would be affected by covering the top half of the lens?
What will be an ideal response?
It would be half as bright since half of the light gets through the lens.
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What were the first celestial bodies added to our solar system inventory by Galileo and his telescope? Why were they important?
What will be an ideal response?
Including relativistic effects, doubling the speed of a object:
a. has no effect on its momentum. c. less than doubles its momentum. b. more than doubles its momentum. d. doubles its momentum.
Hot water in a _______ can will cool off faster than hot water in any other color can
a. white b. red c. black d. silver
What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV when illuminated by 200-nm ultraviolet light? (melectron = 9.11 × 10^-31 kg, h = 6.63 × 10^-34 J×s, 1 eV = 1.60 × 10^-19 J, and 1 nm = 10-9 m)
a. 800,000 m/s c. 653,000 m/s b. 212,000 m/s d. 591,000 m/s