Answer: 1-a, 2- e, 3- b, 4- c, 5 - d
Explanation:
Refracting telescope is used in spy camera as it uses lens to gather and focus light.
Spectrograph separates starlight into wavelengths.
Giant reflectors see behind nebulae dust.
Radio telescope helps in picking up faint lighted stars.
Giant refractors helps to see binary stars.
Hence, 1-a, 2- e, 3- b, 4- c, 5 - d