The average speed of light is greatest in
A) red glass.
B) orange glass.
C) green glass.
D) blue glass.
E) same in all of these
Correct Answer:
Verified
Q21: When a mirror with a fixed beam
Q22: When a light ray passes at a
Q23: The twinkling of the stars is a
Q24: Ninety percent of light incident on a
Q25: When light passes through common windowpane, its
Q27: Refraction results from differences in light's
A)frequency.
B)incident angles.
C)speed.
D)all
Q28: In which material does light travel fastest?
A)glass
B)water
C)plastic
D)air
E)same
Q29: When a light ray in air enters
Q30: Light travels fastest in
A)warm air.
B)cool air.
C)a vacuum.
Q31: Refraction causes the bottom of a swimming
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