Topic 1
If a light source produces a lot of heat it is considered efficient.
True or False?
False
The law of reflection states that....
The angle of incidence is equal to the angle of reflection.
Refraction is when light ___
Bends
Concave Lenses ____ light
Disperse, Diverge
The most efficient light source are LED's
True or False
True
The angle of incidence and the angle of reflection are measured from the...
Normal Line
When light enters a denser medium (ex. water) it ____ and bends ____ the normal
Refracts, towards
Convex lenses ____ light
Converge, concentrate
When a chemical reaction produces energetic particles that give off visible light energy this is called...
Chemiluminescence
If we have a rough surface, the angle of incidence will not be equal to the angel of reflection.
True or False?
False
When light enters a less dense medium (ex. air) from a denser medium (ex. water) it bends _______
Away from the normal line.
To correct nearsightedness we need to use a ____, and to correct farsightedness we need to use a ____ .
Double Concave lens, double convex lens.
Bioluminescence is when...
Living organisms are able to produce their own light. This is done through chemical reactions in their bodies.
Concave mirrors ____ light, one example of use is ___
Convex mirrors ____ light, one example of use is ___
Focus, headlights or flashlight
Disperse, security mirror in stores
When light enters a new medium (ex. water) and bends, the angle at which the light now travels is called the _______
Angle of Refraction
The ___ adjust how much light comes into our eye through the ____ .
The _____ adjust the shape of our lens.
The ____ allows us to see.
Iris, pupil.
Ciliary Muscles
Retina
What are three disadvantages of fluorescent bulbs compared to incandescent bulbs?
1. More Expensive to Make
2. Difficult to dispose of
3. Made of toxic materials
Why couldn't the Mythbusters get the light to reflect off the mirrors for very long when using the sun as a light source?
As the Earth rotates, the Sun's position in the sky changes, therefore you need to adjust mirrors constantly.
The normal is always drawn ____ to the ____
Why do we have a blind spot?
We have a blind spot because there is a point in the eye where it the optic nerve connects to the retina, therefore there are no receptors and we have a blind spot as a result.