Question

-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?

-

(15) Which type of reflector telescope would be the easiest to construct, and why?

(16) 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....

Answer 1

14) Ans) As we know the time taken by the radio signal to reach earth, as well as we also have the velocity of radio Signal(v). With use of these the distance of the spacecraft from the earth is given by the equation

Distance, D=v * t

II)The common in the gamma ray, X-ray, light and radio wave is that all of they belongs to the electromagnetic waves in which the electric field and the magnetic field are perpendicular to each other and the direction of incidence.