Characteristics of Waves
Electromagnetic Waves
Electromagnetic Spectrum
Lens and Mirrors
Light
100
Describe Wavelength
-distance of wave from crest to next crest
-distance of wave from trough to next trough
-how wide the wave is
100
Define electromagnetic waves
Transverse waves that can travel through empty space
100
Define the electromagnetic spectrum
a range of all types of electromagnetic radiation
100
What type of image would a plane mirror reflect?
a virtual image that is upright and the same size as the object that formed the image
100
Examples of Transparent material
window pane
plastic wrap
200
Describe Amplitude
-distance of a wave from resting position to crest
-distance of a wave from resting position to trough
-how tall the wave is
200
List the types of electromagnetic waves in order from lowest to highest frequency.
1. Radio Waves
2. Microwaves
3. Infrared Waves
4. Visible Light Waves
5. Ultraviolet Rays
6. X-Rays
7. Gamma Rays
200
How is the EMS organized?
By increasing frequency/energy of electromagnetic waves
200
What type of mirror is used as a rear view mirror?
convex mirror
200
Examples of translucent material
Jello
waxed paper
300
Describe Frequency
number of waves that occur in a given amount of time
-frequency = #of waves/time (s)
300
Which electromagnetic wave has the longest wavelength?
a. Ultraviolet waves
b. X-rays
c.Microwaves
d. Visible light
Microwaves
300
What part of the EMS is visible to the human eye?
Visible Light
300
What type of lens would be used for a magnifying glass?
Convex
300
Examples of opaque material
people (anything solid that light does not pass through)
400
A. Wavelength
B. Crest
C. Amplitude
D. Trough
400
Which type of electromagnetic wave has the highest frequency?
Gamma Rays
400
Which type of radiation has a shorter wavelength than microwaves but longer wavelength than visible light?
Infrared
400
What type of lens would be used for someone who is nearsighted?
concave
400
Why do some object appear black
All of the light is being absorbed
500
What is the relationship between wavelength and frequency?
They have an inverse relationship - When one increases, the other decreases
500
As we travel from left to right across the EMS, wavelength _________, and frequency ____________.
1. decreases
2. increases
500
Why can ultraviolet radiation be harmful to our skin/eyes but not visible light?
Ultraviolet radiation has a higher frequency that visible light waves.
500
Why does the lake reflect a distorted image on a windy day?
Because the light is being defused. (reflecting off the waves at different angles)
500
Why does someone shirt appear blue
the blue light is being reflected while all of the other light colors are being absorbed