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Light Problems Quiz:
Name___________________
SHOW ALL WORK or CREDIT WILL NOT BE GIVEN.
The product of the frequency times wavelength equals a
constant, the speed of light which is 2.998 x10^8m/s
[1] If a rope were tied around the earth at the equator it would have a circumference
of 40,075,000 meters. How long does it take a beam of light to travel around the
earth?
[1a] How many times can a beam of light travel around the earth in one
second?
[2] How far will light travel in one year? Calculate this in meters and then convert it
into miles (1000m = 1km and 1mi = 1.6km).
[2a] Is a light year a measure of distance or time?
[3] Find out how far the sun is from the earth on average. Use this number to
determine how long in minutes it takes light to reach the earth.
Distance from Earth in meters ______________________ in miles _________________
[3a] Looking at the sky is like looking at history. Explain this statement while
taking into consideration that the nearest star to us is roughly 25 trillion miles
away.
[4] What is the frequency of radiation with a wavelength of 5.00 x 10-8m?
[4] Convert it into nanometers. In what region of the electromagnetic
spectrum is this radiation?
[5] Calculate the wavelength of light emitted by a sodium lamp if the frequency of
the radiation is 5.10 x 1014Hz. I
[5a] Convert into nanometer. In what region of the electromagnetic spectrum
is this radiation?
[6] A laser emits light of frequency 4.74 x 1014 sec-1. What is the wavelength of the
light in nm?
[7] A certain electromagnetic wave has a wavelength of 625 nm. What is the
frequency of the wave?
[7a] What region of the electromagnetic spectrum is it found?
[8] How many minutes would it take a radio wave to travel from the planet Venus
to Earth? (Average distance from Venus to Earth = 28 million miles).
[9] The blue color of the sky results from the scattering of sunlight by air molecules.
The blue light has a frequency of about 7.5 x 1014 Hz. Calculate the wavelength, in
nm, associated with this radiation.