Physics 11
Chapter 11 Review Questions
1.
Water waves travel 16 m in a time of 8.0 s. Their period was observed to be 1.25 s.
Find their wavelength.
2.
Sketch the path of a ray of light as it travels
from the material on the left through each of
the materials to its right.
3.
A light ray traveling from glass (n=1.52) to water (n=1.33) has an angle of incidence of 40o. Find the
angle of refraction.
4.
An unknown material has a critical angle of 43o when immersed in water (n=1.33). Determine its index
of refraction.
5.
A guitar string has a tension of 80 N and a linear density of 0.050 kg/m. Determine the velocity of
waves pulses traveling down the string.
n=1.33
n=1.65
n=1.04
6.
The same Guitar string has a length of 0.800 m.
a)
draw the first 3 harmonic standing wave patterns that are possible
b)
find the size of the first 3 standing wavelengths
c)
find the frequency of each of these 3 standing waves
7.
A Clarinet has a length of 0.800 m.
a)
draw the first 3 harmonic standing wave patterns that are possible
b)
find the size of the first 3 standing wavelengths
c)
find the frequency of each of these 3 standing waves
8.
A Trumpet has a length of 1.50 m.
a)
draw the first 3 harmonic standing wave patterns that are possible
b)
find the size of the first 3 standing wavelengths
c)
find the frequency of each of these 3 standing waves
9.
This pattern below appears on a wall 2.00 m from a diffraction grating. The wavelength of the laser
used was 530 nm.
a)
Find the value of the angles to each of the points indicated.
b)
Find the value of “d” and “a”
5.60 cm
10.
7.00 cm
Find the wavelength (in nanometers) of an incoming photon that hits a metal with a work function of
2.58x10-19 J and liberates an electron and gives the electron 4.47x10-18 J of kinetic energy.
11.
Find the deBroglie wavelength of a proton (m=1.67x10-27 kg) traveling at 5.5x106 m/s.
12.
Calculate the wavelength (in nanometers) of a photon emitted when an electron moves from the n=4 to
the n=2 orbit in a Hydrogen atom.