Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
Definition of Radiation |
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization |
|
|
Where Can Radiation Travel |
Everywhere including a vacuum. |
|
|
Does Radiation Need Air To Travel? |
No |
|
|
What kinds of light do we see? |
Visible Light |
|
|
How Do we feel Infra Red Rays?
|
Heat? |
|
|
Fastest and Slowest Visible Light? |
Slowest: Red: 700 nm long Longest: Violet |
|
|
What do UV Rays produce? |
They produce Vitamin D upon contact with our skin. Too much contact causes sunburn. |
|
|
What is Ionization? |
Knocking out electrons from the atoms, In human bodies it knocks out parts of our DNA. |
|
|
What does white light contain? |
All the colors of the rainbow |
|
|
What happens when light goes through something? |
The light bends and changes speed. |
|
|
What happens when Light enters denser or less dense materials? |
Less Dense => More Dense: The light refracts (bends) Towards the Normal More Dense => Less Dense: Away from the Normal (When light speeds down it refracts away and when it slows it refracts towards) |
|
|
Incident Ray Normal Reflected Ray |
Source of Light Imaginary Line 90 Degrees to the reflecting surface Waves reflected off the object |
|
|
Law of Reflection |
The angle of incidence and the angle of reflection will always be equal. |
|
|
Why are Concave mirrors used in radios? |
Because it makes the strongest signal when they all bounce together and combine |
|
|
Where does Refraction happen?
|
All Waves |
|
|
Speed of Light in Air? |
3 with 8 zeros behind it |
|
|
Fastest material that sound travels through? |
Solids are fastest, gases are slowest, due to the amount of area the particles have to travel to bounce as well as the densities. |
|
|
How to calculate Velocity? |
Velocity = Distance Over Time |
|
|
How is Volume affected? |
Amplitude Higher = Louder Lower = Softer |
|
|
Pitch? |
Wavelength closer = Higher Pitch Wavelength farther = Lower Pitch |
|
|
Frequency measured in |
Hertz (Number of frequencies Per second) |
|
|
Wavelength Measured in |
Meters |
|
|
Velocity Measured in |
Meters per second |
|
|
Finding Wavelength |
Wavelength = Velocity Over Frequency |
|
|
Finding Frequency |
Velocity over Wavelength |
|
|
If the wavelength is 10 meters, speed is 340 m/s what is the frequency? |
34 per second |
|
|
14 HZ Frequency, Wavelength is 3 meters what is the speed? |
42 meters per second |
|
|
Frequency is 5 HZ, speed is 25 m/s what is the wavelength? |
5 meters |
|
|
Period? |
Period = time over wavelength |
|
|
13.22 ms in seconds |
.01322 seconds (Move the decimal place over 3 times)
|
