-How can you determine the distance to a spacecraft from thetime it takes its radio signal to reach Earth?
-What do gamma rays, X-rays, light, and radio waves all have incommon?
-Which type of reflector telescope would be the easiest toconstruct, and why?
-Contrast image formation in reflectors and refractors.
-A reflectingtelescope has a mirror diameter of 4.0 m. What is the angularresolution of the telescope for red light of wavelength 0.7 μm?
-What is theresolution of a telescope?
-What is true of radiotelescopes?
-One advantage of the Hubble Spacetelescope over ground based ones is that....
