5th Grade Light Notes

Question 1

The high point of a wave is called the _______or the_______

Answer 1

Peak or the crest

Question 2

The low point of a wave is called the

Answer 2

Trough

Question 3

Waves can be measured in

Answer 3

Wavelengths

Question 4

A wavelength is the difference between____ _____ _____(crest) to the next______ _______(crest) or from one _______ to the next_________

Answer 4

One wave peak
Wave peak
Trough
Trough

Question 5

Light has properties of both a_______and a________

Answer 5

Wave and a particle

Question 6

Recent theory identifies light as a small particle called a

Answer 6

Photon

Question 7

A photon moves in a______line

Answer 7

Straight

Question 8

In both the light wave and the photon descriptions, light is______

Answer 8

Energy

Question 9

Because light has both electric and magnetic fields, it is referred to as

Answer 9

Electromagnetic radiation

Question 10

Light waves move as______ ______and travel through a vacuum at a speed of approximately_______miles per second.

Answer 10

Transverse waves

186,000

Question 11

Compared to sound, light travels extremely_____

Answer 11

Fast

Question 12

It takes light from the sub less than_______minutes to travel 93 million miles to reach earth.

Answer 12

8 1/2

Question 13

Unlike sound, light waves travel in a straight path called______and do not need a medium through which to move.

Answer 13

Rays

Question 14

A ray is the straight line that represents the____of_____.

Answer 14

Path of light

Question 15

A beam is a group of________rays

Answer 15

Parallel

Question 16

Light waves are characterized by their_________and the frequency of their wavelengths.

Answer 16

Wavelengths

Question 17

The size of a wave is measured as its________,which is the distance between two corresponding points on successive waves, usually crest to crest or trough go trough. The wavelength can be measured from any point on a wave as long a sit is measured to the same point on the next wave.

Answer 17

Wavelength

Question 18

________is the number of waves passing a given point every second. The greater the_______,the greater the amount of energy.

Answer 18

Frequency

Question 19

Light waves are waves of______. The amount of energy in a light wave is proportionally related to its frequency.

Answer 19

Energy

Question 20

High frequency light has_____ ______, low frequency light has_____ ______.

Answer 20

High energy

Low energy

Question 21

The move wavelengths in a light wave in a given period of time, the______the energy level.

Answer 21

Higher

Question 22

_______rays have the most energy. And ______waves have the least.

Answer 22

Gamma

Radio

Question 23

Of visible light,_____has the most energy and____the least.

Answer 23

Violet

Red

Question 24

The number of vibrations in a given time is called the_______

Answer 24

Frequency

Question 25

When a light wave hits an object it will either bounce off, called_______,bend, called_______, pass through called_______or be absorbed as heat.

Answer 25

Reflection Refraction Transmitted

Question 26

Some objects transmit light waves better than others._______materials do not allow light waves to pass through. Reynolds wrap is an example.

Answer 26

Opaque

Question 27

_______materials allow light to pass through but not in a straight path. Wax paper is an example of this. These material allow light waves to pass through easily.

Answer 27

Translucent

Question 28

Light waves are extremely fast. It only takes a light wave eight and 1/2 minutes to travel 150 million kilometers from the sun to the earth. In addition to being fast, these waves are also very______. Amazingly enough, our eyes can see them. We call these visible waves the visible_____

Answer 28

Small | Spectrum

Question 29

We can see many different waves in this visible spectrum. Each of these visible waves is a different wavelength and our eye sees each one as a different color. The longest wave that we can see is called the color_____. The shortest wave that we can see is called the color_____.

Answer 29

Red | Violet

Question 30

The waves that make up the visible spectrum are_____,______,______,______,_____,______,and _____.

Answer 30

``` Red Orange Yellow Green Blue Indigo Violet ```

Question 31

To see the different colors that make up white light, we need to use a_____

Answer 31

Prism

Question 32

When white light passes through a glass prism, it_____and changes direction. This bending of light is called a_______. Each of these waves in the visible spectrum bends differently, so we see different colors.

Answer 32

Bends | Refraction

Question 33

A small particle

Answer 33

Photon

Question 34

The high part of the peak

Answer 34

Crest

Question 35

The low point

Answer 35

Trough

Question 36

A measurement of a wave

Answer 36

Wavelength

Question 37

To travel in a straight path

Answer 37

Ray

Question 38

A group of parallel Rays

Answer 38

Beam

Question 39

The number of vibrations in a given time

Answer 39

Frequency

Question 40

Not that much energy

Answer 40

Low frequency

Question 41

The greater the frequency the more energy

Answer 41

High frequency

Question 42

Light bounces off

Answer 42

Reflection

Question 43

Light is bending

Answer 43

Refraction

Question 44

To pass through or be absorbed by heat

Answer 44

Transmitted

Question 45

Materials that do not allow light waves to pass through

Answer 45

Opaque

Question 46

Materials let light to pass through but not in a straight path

Answer 46

Translucent

Question 47

Materials allow light waves to pass through easily

Answer 47

Transparent

Question 48

Each visible wave is a different wavelength

Answer 48

Visible spectrum

Question 49

We need this to see different colors

Answer 49

Prism

Question 50

What colors are not spectral colors

Answer 50

Black | White

Question 51

Black is a total absence of_______light

Answer 51

Reflected

Question 52

_____is a reflection of all visible light together.

Answer 52

White

Question 53

The term______light refers to light waves that are neither transmitted nor absorbed, but are thrown back from the surface of the medium they encounter.

Answer 53

Reflected

Question 54

If the surface of the medium contacted by the wave is smooth and polished(mirror), each reflected wave will be reflected_____ at the same angle as the incident wave. The wave that strikes the surface of the medium(mirror) is called the ______wave, and the one that bounces back is called the______wave.

Answer 54

Back Incident Reflected

Question 55

The bending of a wave resulting from a change in its velocity(speed) as it moves from one medium to another(light moving from the air into water). The frequency of the wave does not change.

Answer 55

Refraction

Question 56

The amount of bending of the light wave(refraction) depends on

Answer 56

The density of the material The wavelength of the light wave The angle at which the original light wave enters the new medium

Question 57

Some examples of refraction are when

Answer 57

Refraction causes a setting sun to look flat | A spoon appears to bend when it is immersed in a cup of water

Question 58

Two kinds of waves that impact our lives everyday

Answer 58

Light waves and sound waves