If a light source is receding from you at high speed, then the Doppler effect causes a. the wavelength of the light to be increased b. the wavelength of the light to be reduced c. The cooler an object, the bluer the radition it emits. The hotter an object, the bluer the radiation it emits. The hotter an object, the redder the radiation it emits. Temperature is proportional to energy.
Blue light has a a. shorter wavelength and a higher energy than red light.
None of the above. During Winter in the Southern Hemisphere, the declination of the Sun is a. The angle subtended by the Moon as viewed from the Earth is 30 minutes of arc. 1 degree 33.