Physical ScienceSound and Light

Name: Hannah K. and Riley burg

Light travels in straight lines unless reflected or refractedReflected=reflection

occurs when a wave strikes an object or surface and bounces off

Refraction – the bending off a wave as it moves from one medium to another

Visible light is one component of the electromagnetic spectrum Electromagnetic

spectrum= the rainbow

Visible light is one of the seven componants of the electromagnetic waves.

We see visible light, the colors of the rainbow roy g biv.

Light can be reflected with mirrorsLight waves from

the sun or another source of light strikes each part of the object.

The light rays bounce off the object according to the law of reflection, and some of them strike the mirror

Light can be refracted with lensesA lens is a transparent

object that has at least one curved surface that causes light to bend when light goes through the lens.

When light passes through the lens it bends or refracts because the lenses have a curving edges.

Two types of lenses are concave lenses and convex lenses.

Light is essential for visionThe only way you

can see is if light rays hits an object and bounces off to your eyes.

A light ray is a narrow beam of light that travels in a straight line.

Things that absorb light often transmit heatAn example would be a

black shirt and a white shirt, the black shirt absorbs more light making it warmer while the white shirt is reflecting the light that hits it making it not feel as warm as the black shirt.

Black is black because it absorbs all the colors and when it absorbs the light it turns to heat.

Sound is affected by the matter through which it travelsSound travels the

fastest in solids and the slowest in liquids.

Sound sounds louder in solids.

Description of how sound waves travelThe closer ones are the rarefactions and the

more spread apart ones are called compressions.

Sound waves have length, frequency, and amplitudeThe amplitude is how tall or short the wave

length is. The wavelength is the distance between the two humps and the frequency is how many times a wave is repeated in a second

The ear is a receptor for soundThe main receptor in the

ear is the hair cell. They bend and weave when

sound waves hit them and then transmit signals to the brain where it comprehends sound and translates it.

Outer ear: collects the sound.

Middle ear: amplifies the sound.

Inner ear: interoperates the sound

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