What is the relationship between frequency and wavelength?

They have an indirect/inverse relationship

What characteristic of gamma waves gives them their high energy?

High energy from their extremely short wavelengths (or extremely fast frequency)

What does ROY G BIV mean? What part of the electromagnetic spectrum does it refer to?

red, orange, yellow, green, blue, indigo, and violet.

They are the colors of the visible light in order of longest wavelength to shortest wavelength

Which color is more energetic, red or yellow?

Yellow is more energetic than red because it has a shorter wavelength (or larger frequency)

Which type of wave travels faster, gamma or radio?

Gamma waves and radio waves travel at the same speed

Why are microwaves more dangerous than radio waves?

Because they have a higher frequency and carry more energy

LIGHT

a form of energy that allows you to see the things around you.

How does light allow you to see things?

Light travels away from its source. If the reflected light enters your eyes, you can see the object.

NATURAL SOURCES OF LIGHT

lightning, Sun, meteor

ARTIFICIAL SOURCES OF LIGHT

candle, flashlight, lamp

INCANDESCENT LIGHT

High-temperature objects give off hot light or incandescent light. (Candle, Light Bulb, Lava)

LUMINESCENT LIGHT

Cold light It is emitted without heat.

(fireflies, glow in the dark stick)

LUMINOUS OBJECT

Are objects that emit or give out light energy of their own.

(flashlight, sun, stars)

NON-LUMINOUS OBJECT

Are objects that do not produce their own light but will reflect it.

(Moon, Light)

How does light travel?

LIGHT TRAVELS IN STRAIGHT LINES

LIGHT TRAVELS EXTREMELY FAST.

It travels at the speed of 300,000 kilometers per second in a vacuum.

At this speed it can go around the world 8 times in one second.

vacuum

an empty space so there is nothing that stops light from traveling.

LIGHT TRAVELS FASTER THAN SOUND

Thunder and lightning startat the same time, but we will see the lightning first before hearing the thunder.

PLACES WHERE LIGHT IS “BLOCKED”

SHADOWS

The partial or total absence of light

DARKNESS

If the light source is of comparable size to the object, then the shadow will be

“fuzzy ”

The dark inner region is called the

UMBRA

the grey region is called the

PENUMBRA