Select True or False for the following statements about electromagnetic waves.
a) Gamma rays can be produced through electrons oscillating in wires of electric circuits.
b) The Earth's atmosphere is quite transparent to infrared radiation.
c) A vertical automobile antenna is sensitive to electric fields polarized horizontally.
d) Visible light is often emitted when valence electrons change their state.
e) Blue light has a longer wavelength than red.
f) X-rays travel in vacuum at a higher speed than the visible light.
g) The sun's radiation is most intense in the infrared region.