Name______LAKE______Date______Per______
EMR Practice Worksheet
1) Draw a wave diagram and label the following:
a) Amplitude
b) Crest
c) Wavelength
d) Cycle
e) Trough
2) Explain what each symbol represents:
a) h Plank’s Constant
b) c speed of light___
c) E Energy for a specific frequency______
d) f____frequency_
e) l____wavelength_____
3) Write the correct units for the following measurements:
a) Wavelength __meters or nanometers (10-9)
b) Speed of light _meters/second
c) Frequency ____Hz Hertz______
d) Energy __Joules (J)
e) Plank’s constant Joules seconds (J*s)_
4) The letters ROY G BIV represent the colors of visible light.
a) Arrange the colors in order of decreasing wavelength:
ROY G BIV the longest wavelength is Red
b) Arrange the colors in order of increasing wavelength:
VIB G YOR the shortest wavelength is violet
5) Describe the relationship between:
a) Wavelength and frequency inverse
b) Frequency and energy direct
6) An element that has absorbed energy will emit this energy in the form of ______light______. The spectrum created is called the ___visible______spectrum.
7) The amount of energy required to move an electron from one energy level to the next higher level is called an__quanta______.
8) A quantum of light energy is called a _photon______.
9) Electromagnetic radiation can be described as a series of ___waves______, which travel at _3.0 x 108______m/s.
10) Write the formula used to find:
a) Frequency f= c/l
b) Energy è E = h*f
c) Wavelength l=c/f
11) Give the numerical values for
a) Plank’s Constant
6.63 x 10-34Js
b) Speed of light 3.00 x 108m/s
12) List six forms of electromagnetic radiation (other than visible light):
Gamma, x-ray, ultraviolet, visible, infrared, microwave, radio
13) Name the instrument used to study the spectrum of an element. : Spectroscope
14) Define the ground state of an atom: the original orbital that an electron travels in lowest energy state
Show all work for the following problems:
15) A certain green light has a wavelength of 5 x 10-7 m. Calculate:
a) Frequencyà c/l = 3.0x108m/s/5x10-7m = 6.0x1014Hz
b) Energy à hf =6.0x10-14Hz * 6.63x10-34J = 3.98 x 10-19 J
16) Calculate the frequency of yellow light that has a wavelength of 5.73x10-7.
F= c/l 3.0x108m/s/5.73x10-7m à 5.24x1014 Hz
17) Calculate the energy of a photon of light whose frequency is 4.98x 10-14 Hz.
E=hf à 6.63x10-34Js * 4.98x 10-14 Hz. à 3.30x10-47 J
18) Calculate the frequency of light with a wavelength of 4.25x10-7.
F= c/l 3.0x108m/s / 4.25x10-7m = 7.06 x 1014 Hz
19) Calculate the energy of a photon of light that has a wavelength of 6.28x10-7.
F= c/l 3.0x108m/s ÷ 6.28x10-7m à 4.78x1014 Hz
E=hf à 6.63x10-34J * 4.78x1014 Hz = 3.17x10-19 J