Transcript Light Lessons from Dr. Lighthead

What do you know about Mirrors?
1. We see objects because _____.
a. light is reflected off of objects
b. objects generate their own light
c. both A and B
2. Possible shape(s) of mirrors are ___.
a. Flat
b. Concave
c. Convex
d. All of the above
3. Convex mirrors cause light to ____.
a. reflect up only
b. diverge (spread) apart
c. reflect down only
4. Concave mirrors cause light to ___.
a. diverge (spread) apart
b. reflect straight
c. converge to a focal point
5. Which two rules are NOT true about
reflection?
a. light travels in a straight line
b. reflection is in an unpredictable pattern
c. Angles of incidence and reflection are
determined by the curve of the mirror
What do you know about lenses?
6.
Refraction of light is _____ .
a. Change in direction
b. change in speed
c. Both A and B
7. Light travels faster in ____.
a. air b. water c. no difference
8. Eye glasses work because they _____.
a. change the speed of light
b. change direction of light
c. Both A and B
9.
Telescopes are _____.
a. magnification of light
b. both magnification and reflection of light
c. reflecting with mirrors
10. Prisms break light into ____.
a. dominant and recessive colors
b. seven colors of the rainbow
c. light colors vs. dark colors
Light Fact 1:
Light always travels in straight lines
Light Fact 2:
Light is energy that travels in waves of
different wavelengths.
Light Fact 3:
The different wavelengths create the energy we
know as X-rays, Ultraviolet, Visible, Infrared,
Microwaves and Radio waves.
Light Fact 4:
The reflection of light from surfaces allows us to
see objects that do not emit their own light.
Light Fact 5:
• When charged particles from the sun are
captured by the Earth’s magnetic field it
creates an effect we call the AURORA
BOREALIS or Northern Lights
Light Fact 6:
• Convex mirrors cause waves to diverge
• Note that these behave as if there is a
focus behind the mirror, called a virtual
image
Light Fact 7:
Only a convex lens can form a real image.
Real images are inverted and smaller than
the actual image
Learn more about Mirrors!
Learn More about Lenses!
NOW, what do you know
about Mirrors?
1. We see objects because _____.
a. light is reflected off of objects
b. objects generate their own light
c. Both A and B
2. Possible possible shape(s) of mirrors are ___.
a. Flat
b. Concave
c. Convex
d. All of the above
3. Convex mirrors cause light to ____.
a. reflect up only
b. diverge (spread) apart
c. reflect down only
4. Concave mirrors cause light to ___.
a. diverge (spread) apart
b. reflect straight
c. converge to a focal point
5. Which two are not rules about reflection?
a. light travels in a straight line
b. reflection is in an unpredictable
pattern
c. Angles of incidence and reflection are
determined by the curve of the mirror
What do you know about lenses?
6.
Refraction of light is _____ .
a. Change in direction
b. change in speed
c. Both A and B
7. Light travels faster in ____.
a. air
b. water
c. no difference
8.
Eye glasses work because they _____.
a. change the speed of light
b. change direction of light
c. Both A and B
9.
Telescopes _____.
a. magnify light
b. both magnify and reflect of light
c. reflect light
10. Prisms break light into ____.
a. dominant and recessive colors
b. seven colors of the rainbow
c. light colors vs. dark colors