-How can you determine the distance to a spacecraft from the time it takes its radio...

-How can you determine the distance to a spacecraft from the time it takes its radio signal to reach Earth?

-What do gamma rays, X-rays, light, and radio waves all have in common?

-Which type of reflector telescope would be the easiest to construct, and why?

-Contrast image formation in reflectors and refractors.

-A reflecting telescope has a mirror diameter of 4.0 m. What is the angular resolution of the telescope for red light of wavelength 0.7 μm?

-What is the resolution of a telescope?

-What is true of radio telescopes?

-One advantage of the Hubble Space telescope over ground based ones is that....

Solutions

Expert Solution

DO NOT POST THESE MANY QUESTIONS AT ONCE......PLEASE ABIDE BY THE RULES.

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The distance between Earth and the ship is measured by sending up a radio signal from Earth with a time stamp on it. The spacecraft reverts back the signal, and people on the ground can see how long it took to travel from Earth to the ship and back. Since all radio waves travel at the speed of light, scientists can look at how long it took for the signal to make it to the ship and back and figure out the distance.

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They all are electromagnetic waves and travel at speed of light.

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I think easiest to construct is prime focus reflector because it needs only a single optical surface, at the front of main mirror.

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The difference in reflector and refractor comes from the way light is focused.

Reflectors use a curved mirror to reflect the light back to a focus.

Refractors use a convex lens to bend the transmitted light to a focus.

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Angular resolution = 0.25 * 0.7 / 4

Angular resolution = 0.04375

genius_generous answered 4 months ago

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