Question

12
radio waves diffract around buildings more than light waves do because, compared
to light waves, radio waves
move faster
move slower
have a higher frequency
have a longer wavelength
13
a photon of which electromagnetic radiation has the most energy?
ultraviolet
x ray
infrared
microwave
14
which part of the electromagnetic spectrum has frequencies that are greater than the
frequency of visible light?
microwaves
infrared light
radio waves
ultraviolet light
15
the figure below shows regions of the electromagnetic spectrum.
which of the following waves has the highest frequency?
visible light
microwaves
ultraviolet rays
infrared radiation

Explanation:

• Question 12:
• Diffraction is more significant when the wavelength is comparable to the size of the obstacle. Radio waves have longer wavelengths than light waves, so they diffract around buildings more.
• Question 13:
• The energy of a photon is given by \(E = h

u\) (where \(h\) is Planck's constant and \(
u\) is frequency). X - rays have higher frequencies than ultraviolet, infrared, and microwaves, so a photon of X - ray has the most energy.

• Question 14:
• The order of increasing frequency in the electromagnetic spectrum is: radio waves < microwaves < infrared < visible < ultraviolet < X - rays < gamma rays. Ultraviolet light has a higher frequency than visible light.
• Question 15:
• From the order of the electromagnetic spectrum (radio < microwaves < infrared < visible < ultraviolet < X - rays < gamma rays), ultraviolet rays have a higher frequency than visible light, microwaves, and infrared radiation.

Answer:

1. have a longer wavelength
2. x ray
3. ultraviolet light
4. ultraviolet rays