Physics, 05.05.2020 07:10 book0001

The Hubble Space Telescope has an aperture of 2.4 m and focuses visible light (380â€“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

Show answers

Another question on Physics

Physics, 22.06.2019 03:00

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Answers: 3

Answer

Physics, 22.06.2019 06:00

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves

Answers: 3

Answer

Physics, 22.06.2019 11:10

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Answers: 3

Answer

Physics, 22.06.2019 14:30

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates

Answers: 3

Answer

You know the right answer?

The Hubble Space Telescope has an aperture of 2.4 m and focuses visible light (380â€“750 nm). The Ar...

Questions