Chapter 15 Sound and Light

A measure of how high or low a sound is identified to be depending on the frequency of the sound wave.

A up and down wave that is caused by vibrations and travels through a material medium.

Slow vibrations of frequencies lower than 20 Hz.

Any sound wave with frequencies higher than 20,000 Hz.

A event that occurs when two objects naturally vibrate at the same frequency.

The rate at which energy flows through a given area of space.

The most common unit used to measure loudness. (dB)

SOund, Navigation, And Ranging, a system that uses audio signals to determine the location of objects or to communicate.

A unit or portion of light; a particle of electromagnetic radiation that has 0 rest mass and carries a portion of energy.

The amount at which energy flows through a give space.

RAdio, Direction, And Ranging, a system that uses reflected radio waves to find the speed and location of objects.

A line is space that matches the direction of the flow of glowing energy

A picture that forms a location from which light rays appear to come but do not actually come

A picture of an object formed by light rays that actually come together in a specific location

An angle made by the line upright to a surface and the direction in which a reflected ray moves.

The angle between a ray that hits a surface and the upright to that surface at the point of contact.

A law that says that the angle of incidence is the same as the angle of reflection.

A curved inward mirror that looks like the inside of a spoon

The full reflection that takes place within a substance when the angle of incidence of light hitting the surface boundary is less than the critical angle.

A see through object that refracts light waves that they come together or go apart to create a image

The change in size of a picture compared withe that size of an object.

A triangular system that consists of two or more surfaces of a see through solid at an angle with each other.

The process of taking apart a wave of different frequencies into its singular component waves.

The point on the axis of a mirror or lens at which all incident coextending light rays come together or go apart.