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Light And EM Waves 2
Test Description: Mirrors and lens
Instructions: Answer all questions to get your test result.
1) Which of these are both converging?
A
convex mirror and convex lens
B
concave mirror and convex lens
C
concave mirror and concave lens
D
convex mirror and concave lens
2) Which of these are both diverging?
A
concave mirror and convex lens
B
concave mirror and concave lens
C
convex mirror and concave lens
D
convex mirror and convex lens
3) How are the focal length and the center of curvature related?
A
the are two names for the same thing
B
the center of curvature is twice the focal length
C
they are not related
D
the focal length is twice the center of curvature
4) If a lens creates a real image, which of the following CANNOT be true?
A
the image is smaller than the object
B
the image is inverted
C
the image is upright
D
the image is bigger than the object
5) What is the sign of the focal length for a concave mirror?
A
negative
B
positive
6) What is the sign of the focal length for a convex mirror?
A
negative
B
positive
7) What is the sign of the focal length for a concave lens?
A
negative
B
positive
8) What is the sign of the focal length for a convex lens?
A
negative
B
positive
9) What is the speed of light?
A
c = 3 x 10^8 m/s in a vacuum, varies by medium
B
c = 3 x 10^8 m/s, no matter what
C
always changing
D
100 mph
10) Which of the following is FALSE?
A
virtual images are always upright
B
the real and virtual sides are different for mirrors and lenses
C
the real and virtual sides are the same for mirrors and lenses
D
real images are always inverted
*select an answer for all questions
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