Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. Why is this?
A) Radio waves are unpolarized, whereas light is normally polarized.
B) The wavelength of light is much smaller than the wavelength of radio waves.
C) The wavelength of light is much greater than the wavelength of radio waves.
D) Radio waves are coherent and light is usually not coherent.
E) Radio waves are polarized, whereas light is usually unpolarized.
Question 2
If an atom has 104 electrons, 157 neutrons, and 104 protons, what is its approximate atomic mass?
A) The approximate atomic mass is 365.
B) The approximate atomic mass is 261.
C) The approximate atomic mass is 157.
D) The approximate atomic mass is cannot be determined with the information given.
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