Chapter 3: Information From The Cosmos

How do we obtain detailed information about planets, stars, or galaxies that are too far away for personal visit?

• By using the laws of physics to interpret the electromagnetic radiation emitted by those objects

• By sending a person to those objects

• By using the naked eye to observe those objects

• By studying samples brought back from those objects

What type of electromagnetic radiation is NOT apart of the Electromagnetic Spectrum?

• Radio waves

• Infrared waves

• Ultraviolet waves

• Microwaves

What is a wave?

• A physical object that transfers energy from one place to another

• A pattern of up and down motion that transfers energy from one place to another

• A disturbance that moves across water

• A disturbance that moves through a material medium

What determines the electrical force exerted by a charged particle on all other charged particles in the universe?

• The electrical field

• The magnetic field

• The union of electricity and magnetism

• The charge of the particle

What are the elementary particles that are the building blocks of all atoms?

• Protons and neutrons

• Electrons and protons

• Neutrons and electrons

• Only Neutrons

What is an object's direct measure of the amount of microscopic motion within it?

• Mass

• Temperature

• Volume

• Density

Which theory describes light and other forms of radiation as electromagnetic waves traveling through space?

• The Quantum Theory of Radiation

• The Wave Theory of Radiation

• The Relativity Theory of Radiation

• The Particle Theory of Radiation

Our perception of the wavelength of a beam of light can be altered by the source’s velocity relative to us. This motion induced change in the observed frequency of a wave is called the ______________________.

• Doppler effect

• Refraction

• Diffraction

• Interference

Any net motion of the source away from the observer causes a

• Redshift

• Blueshift

Does a wave travel place to place with physical movement?

• Yes

• No