Light

Question 1

Electromagnetism doesn’t ??

Answer 1

Need a medium to travel through bc electric wave pushes the magnetic wave and magnetic wave pushes the electric one

Question 2

Speed of light

Answer 2

186,000 miles per second

Question 3

When you see sun light it’s actually an imagine from

Answer 3

81/2 minutes ago

Question 4

Closest star is

Answer 4

2 light years away

Question 5

Explain how the moons gravity pulls the ocean

Answer 5

It pulls ocean on both sides of the earth causing the ocean to bulge causing 2 high tides and 2 low tides

Question 6

E=mc2

Answer 6

Energy = mass speed of light

Question 7

Energy and mass are

Answer 7

Proportional

Question 8

White light is

All colors are (how did Newton show this)

Answer 8

All the colors together

Pieces of white light and he used a prism and shone white light through it

Question 9

refraction

Answer 9

Bending of light

Question 10

Lens

Answer 10

Piece of glass that either magnifies an object or makes it smaller

Question 11

Explain mirage

Answer 11

Say there’s a car on the road and the sun is shining down, the hot air is rising to the cool air and the sun light bending between the warm and cool air causes a mirage

Question 12

Double rainbows

What do you need to see a rainbow

Answer 12

Are opposites
Red-purple purple- red
Sun behind you and storm Infront of you

Question 13

Polirazarion

Answer 13

Axis of rotation of light is random

It refeacts 1/2 the light so they all have the same axis

Question 14

2 polarizes in opposition

Answer 14

Block out the light

Question 15

Radio waves
Length
Commonly used for

Answer 15

Length of soccer field
Radio (am=amplitude modulation & fm=frequency modulation)
Tv
Cellphones

Question 16

Microwaves
Shorter than
Used for

Answer 16

Shorter than radio waves
Microwaves
GPS (global positioning system)
Radar ( radio detection and ranging)

Question 17

Danger or pacemakers and microwaves

Answer 17

Microwaves can leak and cause pacemakers to stop working and cause heart attacks

Question 18

Infared

Answer 18

Heat
Just below Red visable light
You can’t see it

Question 19

Ultraviolet light

Answer 19

UVA - non ionizing visible light and harmless
UVB - ionizing sunburn
UVC - ionizing X-rays, blocked by our ozone in our atmosphere

Question 20

Time dialation

Answer 20

Time is stretched when objects approach speed of light
Say Me.Moore was in a truck then speed would equal distance divided by time but an observer who is far away speed = DISTANCE divided by TIME since the distance is bigger the time has to be bigger to and now time is stretched and the object pictures in slow-motion

Question 21

Light is caused by

Answer 21

Electrons orbiting and giving off quanta

Question 22

If Courtney travels into space/tike travel example

Answer 22

If Courtney travels into space at half the speed of light and is gone for two 1/2 years. She was actually only gone for two years that I was waiting still for 2 1/2 but the time was different up in space

Question 23

Lorenz contraction

Answer 23

When I basketball is moving it looks smaller and kind of distorted and if a basketball is moving at the speed of light it would look like a stick but it never loses its shape it just appears different

Question 24

How is mass different when something is moving at the speed of light

Answer 24

Yes it becomes infinite flight and the mass increases but an object can never quite reach a speed of light because if I did the mass would equal the mass of the universe

Question 25

Gravity is proportional to

Answer 25

Mass

Question 26

Gravity is the distortion of

Answer 26

The time space continuum caused by the fact that there’s so much mass

Question 27

Maxwell and Einstein say light is a light wave and is now called

Answer 27

Electromagnetic radiation