What are waves that periodically emit electric and magnetic fields?

What is the distance between two crests?

What is an electromagnetic wave that can travel 186,000 miles/second without a medium.

What is the SI unit for frequency?

What is a wave in which the direction of displacement is perpendicular to the direction of propagation.

What is the reflection of sound waves?

What is a wave that is a vibration in matter, transferring energy through a material?

What is the process by which a beam of light or other wave spread out as a result of passing through a narrow opening?

What allows light to pass through so that objects behind can be clearly seen?

What are vibrations that travel through a medium and can be heard when they reach an animal's ear?

What is a substance that makes possible the transfer of energy from one location to another?

What is the tendency of a system to vibrate with increasing amplitudes at some frequencies of excitation?

What is the change in the direction of waves as they pass from one medium to another, in other words, the path of the wave bends.

What occurs when light hits an object and its electron begins to vibrate for brief periods of time? If the object is transparent, the electrons are transmitted to neighboring atoms through the object and re emitted to the other side of the object.

What is blocking the passage of radiant energy and especially light?

What is a progressive disturbance propagated from point to point in a medium without progress by the points themselves?

What is the highest point the medium rises to?

What is the process in which energy is emitted as particles or waves?

What is a change in position of an object over time?

What is the transfer of the energy of a wave to matter as the wave passes through it?

What is the displacement of the medium is in the same direction as the direction of propagation of the wave?

What is the number of waves that pass a fixed point in unit time?

What transmits and diffuses light so that objects beyond cannot be seen clearly?

What is the lowest point the medium sinks to?

What is the maximum displacement moved by a point on wave measured from its equilibrium position and is equal to one-half the length of the vibration path?