The Hubble Space Telescope has an aperture of 2.4 m and focuses visible light (380–750 nm). The Arecibo radio telescope in Puerto Rico is 305 m (1000 ft) in diameter (it is built in a mountain valley) and focuses radio waves of wavelength 75 cm.
(a) Under optimal viewing conditions, what is the smallest crater that each of these telescopes could resolve on our moon?
(b) If the Hubble Space Telescope were to be converted to surveillance use, what is the highest orbit above the surface of the earth it could have and still be able to resolve the license plate (not the letters, just the plate) of a car on the ground? Assume optimal viewing conditions, so that the resolution is diffraction limited.
Answers: 2
Physics, 21.06.2019 22:50, Scp049
As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.
Answers: 1
Physics, 22.06.2019 18:00, ggdvj9gggsc
Atank is filled with an ideal gas at 400 k and pressure of 1.00 atm . part a the tank is heated until the pressure of the gas in the tank doubles. what is the temperature of the gas?
Answers: 3
Physics, 22.06.2019 19:00, ramjand7853
Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m
Answers: 2
The Hubble Space Telescope has an aperture of 2.4 m and focuses visible light (380–750 nm). The Ar...
Biology, 07.01.2020 13:31
Mathematics, 07.01.2020 13:31
Chemistry, 07.01.2020 13:31
Mathematics, 07.01.2020 13:31
Geography, 07.01.2020 13:31