QUIZ 1: SPEED OF LIGHT TO PROPERTIES OF LIGHT
Light traveling through air at 3.00 · 108 m/s reaches an unknown medium and slows down to 2.00 · 108 m/s. What is the index of refraction of that medium? n = ___
1.5
What is the speed of light in a vacuum in mi/s? ___ mi/s
186,000
If the index of refraction of water is 1.33, what is the speed of light in water? ___ m/s
2.26 x 10^8
As light reflects off a mirror the angle between the incident ray and reflected ray of light is 50°. What is the angle of reflection? ___°
25
A beam of light shining from water to air strikes the surface at an angle greater than 48° and produces total internal reflection. If the incident beam is at a 50° angle, at what angle is the reflected beam? 5 0° 1 00° 25° 13°
5 0°
Match these items. Match the items in the left column to the items in the right column. 1.effect observed when light from an object in cool air passes through warm air 2.line perpendicular to a surface 3.splitting of light into its component colors 4.alignment of light into a single vibrational direction 5.larger angle as light passes from air to water 6.cause of the sky's color 7.bouncing of light rays 8.bending of light between media 9.ratio of speeds of light 10.inability of light to escape a low-velocity medium due to a large angle of approach
6 scattering 9 index of refraction 7 reflection 4 polarization 8 refraction 3 dispersion 5 angle of incidence 1 mirage 2 normal 10 total internal reflection
The first scientist on record to attempt the measurement of the speed of light was ___.
Galileo
In 1880 an American performed the first accurate measurement of the speed of light for which he received the Nobel prize. The scientist was ___.
Michelson
A Danish astronomer who used the diameter of the earth's orbit in his calculation of the speed of light was ___.
Roemer
The index of refraction of light varies from color to color. True False
True
If Galileo's experiment did not measure the speed of light, what did it measure? calculated the speed of light over a short distance the speed of light using large distances the accurate measure of the speed of light in the air measured reaction time
measured reaction time
