Question : Electromagnetic radiation that behaves like a particle is called a(n) A) photon B) quark : 2147168
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
3) Electromagnetic radiation that behaves like a particle is called a(n) ________.
4) X-rays have shorter wavelength than visible light; therefore, X-rays ________.
A) have lower energy than light waves
B) are higher energy than light waves
C) pass through materials because their photons are smaller than light photons
D) cannot be detected because of their wavelength
5) Visible light is a small part of the electromagnetic spectrum, but when we see colors, we are seeing ________.
A) refractions of white light
B) different photons that come from different directions
C) an even narrow range of wavelengths than white light within the visible light spectrum
D) complementary spectra from light re-emitted off objects when light impinges on the object
6) The wavelength of light emitted from a distance object is related to ________.
A) gravity–gravity bends electromagnetic waves causing refraction and sorting of wavelengths
B) the energy of the source. A more energetic source has lower wavelength emissions
C) the energy of the source. A more energetic source has higher wavelength emissions
D) distance of the source–the farther away the object is, the lower the wavelength observed related to changes in electromagnetic energy over time
7) Light travels 300,000 km/s. Many communications satellites are in geosynchronous orbit (that means they keep up with Earth's rotation and thus stay above the same spot on earth) at about 36,000 km above Earth's surface. If you talk to your friend on the other side of the world via a geosynchronous satellite using Skype or your phone, what is the minimum time delay there will be between you and your friend in your conversation?
A) .12 seconds
B) .24 seconds
C) 8.3 seconds
D) .48 seconds
8) Light is an electromagnetic wave, meaning an electric field and magnetic field travel together, oscillating at specific frequency. All metals are electrical conductors and all metals are also opaque to light. Why might this be, knowing the nature of light waves?
A) The magnetic field polarizes iron, so all metals have a similar property, so when the magnetic field interacts with atoms, it dissipates the wave.
B) The electric field of the wave excites electrons, which move through the solid conductor
and dissipate the electric field, stopping the light wave.
C) The metal atoms absorb the light into their nucleus.
D) The free electrons in the metal capture the light.
9) The intensity of the light emitted and its wavelength tell us about the ________ that is generating the light.
A) distance away the object is
B) type of process
C) part of the solar system
D) exact object
10) The study of spectroscopy was begun by ________.
A) Albert Einstein
B) George Hale
D) Niels Bohr
E) Sir Isaac Newton
14) If a yellow star is moving away from us very rapidly, what color will it appear to be?
A) bluish purple
B) reddish orange
C) greenish blue
15) A microwave oven is a good example of a familiar device that relies on absorption of electromagnetic waves at fixed frequencies by specific elements or compounds. In this case, water absorbs strongly in the microwave band used by the device, heating water molecules in food. What might a microwave oven imply about measuring microwaves emitted by the Sun on Earth?
A) Microwaves will never make it to Earth because they will get absorbed by hydrogen between Earth and the Sun.
B) Microwave radiation will be heavily absorbed in the earth's atmosphere, particular if humidity is high.
C) Microwaves must be the major reason for global warming.
D) It is irrelevant; the Sun does not emit microwaves.