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are regard as distributions that travel in space

form from a material to another material.

needs a medium to propagate and to transmit energy.

Does not need any medium to travel. They can travel through empty space - vacuum.

Example - electromagnetic waves, UV

rays/ light.

a wave in which the vibrating elements moves in a direction perpendicular to the direction of advance of a wave.

All matter contains charged particles that are always moving; therefore, all objects emit

• It needs medium that has compact atoms; such as a solid material/ medium.

• The speed of of light is around__________ kilometres per seconds, at this speed they can go around the world & times in one seconds.

• The distance light travels to complete 1 cycle. Distance from crest to crest.

• number of cycles completed in 1 seconds. Number of wavelengths that pass the given point in 1s.

the height of the wave

Kabaligtaran ng smth

Example: long wavelength - short frequency

Short wavelength - long frequency