The Ear. 1. The outer ear collects sound waves. 2. The sound waves make the eardrum vibrate

The Ear

1. The outer ear collects sound waves.

2. The sound waves make the eardrum vibrate.

3. The eardrum causes 3 tiny bones to vibrate. (hammer, anvil, stirrup)

4. The tiny bones make the fluid in the cochlea vibrate.

5. This causes tiny hair cells to vibrate (in cochlea).

6. Vibrations are passed to the auditory nerve which leads to the brain.

7. The brain interprets sound!

What did one ear say to the other ear before they went over the waterfall?

What did one ear say to the other ear before they went over the waterfall?

Ear we go!

Doppler Effect

Eye and Light

How we see.1. Light passes through the transparent cornea.2. The light that passes through the opening of the pupil, the amount of light is controlled by the iris

contracting and releasing.3. The light is reflected through the lens and the image is projected upside down on the retina.4. The cones on the retina respond to different frequencies of light (colors)5. The optic nerve transmits information to the brain.6. The brain interprets the information from the optic nerve and you see the world around you.

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Why do we see color?When our eyes see different

wavelengths of light in the visible spectrum, we see colors.

http://www.astronomynotes.com/light/colorswvl.gif

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Seeing colorWhat we actually see is the light an object reflects or in some cases the light an object produces. For example, a red book only reflects red light:

White

lightOnly red light is

reflected

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A white hat would reflect all seven colours:

A pair of purple pants would reflect purple light(and red and blue, as purple is made up of red and blue):

Purple light

White

light

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Using coloured light

What about an outfit?

Shorts look blue

Shirt looks red

White

light

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BlackWhen you see black, all of the wavelengths of light are absorbed and no light is reflected back at you.

White

light

Nothing is reflected.

All visible light is absorbed.

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The Electromagnetic Spectrum

• Different wavelengths of EM waves.

• These

wavelengths of light and others make up a spectrum.

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On the Spectrum…

Left Side Right Side

Type of Wave

Wavelength

Frequency

Energy

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VISIBLE LIGHT

Electromagnetic waves we can see.

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Visible Spectrum• The visible

spectrum contains seven colors.

• Each of these colors corresponds with a particular wavelength.– Longest

wavelength= red light

– Shortest wavelength= violet (purple) light

http://ldt.stanford.edu/ldt1999/Students/tita/mjrproj/color/wavereview.html

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How can I remember the seven colors of the visible

spectrum?

ROY G BIVED

RANGE

ELLOW

REEN

LUE

NDIGO

IOLET

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White Light• White light is not a single color; it is

made up of a mixture of the seven colors of the rainbow.

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ColourWe can demonstrate this by splitting white light with a prism:• This is how rainbows are formed: sunlight is “split up” by raindrops.