The brakes in a car work because of Pascal's principle
a. True
b. False
Indicate whether the statement is true or false
True
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Why is it better to search for extrasolar planets directly using infrared (IR) rather than visible radiation?
A) the planet doesn't reflect any visible radiation, only IR radiation B) the star doesn't emit any IR radiation because it is too hot C) the visible light from planets will be blocked by interstellar dust along our line of sight while the IR radiation will not D) the planet emits more IR radiation than it reflects in the visible
Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?
a. total reflection b. total transmission c. partial reflection, partial transmission d. partial reflection, total transmission
A single slit, 1,400 nm wide, forms a diffraction pattern when illuminated by monochromatic light of 490-nm wavelength. What is the largest angle from the central maximum at which the intensity of the light is zero?
A) 44° B) 41° C) 38° D) 35° E) 32°
The birth of a thunderstorm occurs when
A) warm, humid air rises in a stable environment. B) warm, humid air rises in an unstable environment. C) a cold front encounters a warm front. D) a maritime polar air mass encounters a maritime tropical air mass.