Properties of Light
What is light?
A form of energy
What is the electromagnetic spectrum?
A diagram that demonstrates electromagnetic waves according to their lengths and frequencies
What kind of source emits heat?
Incandescent
The source of light emits incident rays or reflected rays?
Incident rays
What are the two laws of reflection?
1) The angle of incidence equals the angle of reflection
2) The incident ray, reflected ray, and normal are on the same plane
If in the same medium, how does light travel?
In a straight line
What kind of radiation has the highest frequencies and shortest length?
Gamma rays
What kind of light is produced during a chemical reaction?
Chemiluminescent
What kind of rays allow us to see an image?
Reflected rays
What does the acronym LOST stand for?
- Location
- Orientation
- Size
- Type
What principle states that light travels in a straight line?
Fermat Principle
What kind of radiation has the longest waves and is the least harmful?
Radio waves
Which kind of light stores energy and then emits it for a short period of time?
Phosphorescent
How can we see in a mirror?
Incident rays bounce off the mirror and some of the reflected rays will hit our eyes, allowing us to see the image
If the angle of incidence is 23 degrees, what is the angle of reflection?
23 degrees
What is the speed of light?
3 x 108 m/s
What kind of light can we see?
Visible light
Fluorescent light is an example of what source of light?
Luminescent
What are the three things that happen when light hits a surface?
It gets absorbed, transmitted, and reflected
What is the difference between a real and a virtual image?
A real image is an image formed on a screen while a virtual image is formed in the mirror
How can light behave?
As a particle and as a wave
What radiation type goes after microwaves?
Infrared
Light produced by living organisms
Bioluminescence
How do you determine the characteristics of an image?
You compare the image with the object
Where is the normal ray located?
Perpendicular (90 degrees) to the surface and exactly where the incident ray hits the surface.