At the Tropic of Cancer the sun is directly overhead at noon on the
A) vernal equinox.
B) summer solstice.
C) autumnal equinox.
D) winter solstice.
Question 2
The energy with wavelengths between 0.4 to 0.7 microns is known as
A) infrared.
B) radio waves.
C) X-rays.
D) visible light.