LIGHT

Question 1

What is light?

Answer 1

It is a form of electromagnetic radiation visible to the human eye.

Question 2

What particles is light composed of?

Answer 2

photons

Question 3

Who said that light behaves like a particle?

Answer 3

Isaac Newton

Question 4

Who said the electromagnetic theory of light?

Answer 4

James Clerck Maxwell

Question 5

Who said that light can be a particle and a wave?

Answer 5

Louie de Broglie

Question 6

Who said that light behaves like a wave?

Answer 6

Christian Huygens

Question 7

Light has a 1._______________ and 2.______________ and it travels in a 3._____________ line path with or without medium

Answer 7

1. wavelike nature
2. particle-like nature
3. straight

Question 8

light is a______

Answer 8

electromagnetic wave

Question 9

The Sun is our _______________ of light.

Answer 9

natural source

Question 10

The Sun is a_________

Answer 10

luminous body

Question 11

Light is formed by the1._____________ of 2.__________ and 3._________________ therefore it is a form of 4.______________.

Answer 11

1. vibration
2. magnetic
3. electromagnetic fields
4. electromagnetic radiation

Question 12

Translucent materials______

Answer 12

partly allow light to get through

Question 13

Opaque materials do not 1._________ to 2._______ instead it will 3.___________

Answer 13

1.allow light
2. pass through
3. absorb and convert it to heat

Question 14

Transparent materials____

Answer 14

allow light to get through

Question 15

What are the characteristics of light

Answer 15

1. frequency
2. wavelength
3. intensity
4. polarization

Question 16

polarization refers to the 1.___________________ which can be 2.__________________

Answer 16

1. orientation or direction of the light waves
2. vertical, horizontal, or at an angle

Question 17

Humans can see colors because of the presence of __________ in the eyes

Answer 17

cone cells

Question 18

A human eye has around _______ million cone cells

Answer 18

6 to 7

Question 19

What is intensity?

Answer 19

it refers to the the brightness or amount of light present

Question 20

Frequency falls between

Answer 20

400 to 750 teraherts (THz)

Question 21

Its Wavelength ranges between

Answer 21

400 to 700 nanometers

Question 22

What is frequency and wavelength

Answer 22

determine the color of light. Higher frequencies correspond to shorter wavelengths and bluer light while lower frequencies correspond to longer wavelengths and redder light.

Question 23

what are invisible to the human eye

Answer 23

1. gamma rays
2. x-rays
3. ultraviolet
4. infrared
5. radar
6. FM
7. TV
8. AM

Question 24

What are the 2 branches of the electromagnetic spectrum?

Answer 24

1. Non-ionizing
2. ionizing

Question 25

what is the range of electromagnetic spectrum?

Answer 25

Extremely low frequency =AM
radio waves = FM, TV
microwaves =CELLPHONES
infrared = TV REMOTE
ultraviolet = SUN
x-rays = X-RAY MACHINE
gamma rays = RADIOACTIVE ELEMENTS

Question 26

What is part of the visible sp[ectrum?

Answer 26

light bulb

Question 27

the higher amplitude_______

Answer 27

brighter light

Question 28

the lower amplitude______

Answer 28

dull light