Light Energy Visible light arrives on Earth with the other kinds of waves on the electromagnetic spectrum That’s the light people see Most people think of visible light when talking about light waves The study of light waves is optics ELECTROMAGNETIC SPECTRUM RADIO WAVES MICROWAVES INFRARED RADIATION VISIBLE LIGHT ULTRAVIOLET RADIATION X-RAYS GAMMA RAYS 6
However visible light is only one kind of electromagnetic energy Each kind of light energy on the spectrum has a different-sized wavelength Waves like radio waves visible light microwaves x-rays and others line the electromagnetic spectrum Visible light 7
Sound waves move through a medium in alternating groups of closely packed waves and waves that are spread further apart Sound Energy Sound waves are mechanical They move as vibrations The molecules don’t travel but the waves do Sound moves in a series of waves Sound waves can only travel through a substance or material called a medium Colliding molecules form the waves The molecules pass on their energy 8
Sound waves travel in air water or through objects 9
