In a telescope, diffraction creates ________.
A. washed out images
B. bright and clear images
C. images with faint ripples
D. images fringed with color
Answer: C
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A double-slit experiment uses coherent light of wavelength 633 nm with a slit separation of 0.100 mm and a screen placed 2.0 m away
(a) How wide on the screen is the central bright fringe? (b) What is the distance on the screen between first-order and second-order bright fringes? (c) What is the angular separation (in radians) between the central maximum and the first-order maximum?
Heat Engines: A heat engine receives 7000 J of heat and loses 3000 J in each cycle. What is the efficiency of this engine?
A. 57% B. 30% C. 70% D. 43%
The rings of Saturn consist primarily of ________.
A. methane and ammonia B. water ice C. hydrogen and helium D. silicate rocks
The specific heat
