High above the surface of the Earth, charged particles (such as electrons and protons) can
become trapped in the Earth's magnetic field in regions known as Van Allen belts. A typical
electron in a Van Allen belt has an energy of 55 keV and travels in a ro
An apparatus similar to the one used in electrical energy lab is used to find the heat added to a
mass of water. The temperature of 163 2 grams of water increases by 14.5
0.3 C
During the process, how much heat was added to the water?
What is the uncerta
Light of wavelength 620nm falls on a slit that is 3.5010-3mm wide. How far the first bright
diffraction fringe is from the strong central maximum if the screen is 10.5m away.
Answer:
Diffraction maxima occurs in directions
m
such that
d sin m m
m
Hence
What is the maximum amount by which the wavelength of an incident photon could change
when it undergoes Compton scattering from an oxygen molecule?
Answer:
The maximum Compton shift is said to occur when the incident photon bounces back from
the scatterer
2 charges 2 nC and -6 nC are placed at A and B. There must be a point C which lines on the
line joining A and B such that electric potential is zero at C. The AB=2m, determine how far
is the point C from the charge at A.
Answer:
Electric potential at C du
You have a string with a mass of 13.3 g. You stretch the string with a force of 8.79 N, giving it a
length of 1.81 m. Then you vibrate the string transversely at precisely the frequency that
corresponds to its fourth normal mode, that is, at its fourth ha
A 15 kg block is at rest on a level floor. A 380 g glob of putty is thrown at the block such that
it travels horizontally, hits the block, and sticks to it. The block and putty slide 15 cm along
the floor. If the coefficient of sliding friction is 0.40, w
What is the surface temperature of a star which radiates with a peak wavelength of about 970
nm?
A star is treated as a black body which radiates according to Planck radiation law,
Weins displacement law etc.
Surface temperature of the star can be found u
State whether true or false. Explain.
Light travels faster in vacuum than it does in a glass.
The path of a ray of light between two points is the path that minimizes the travel time.
White light that is reflected from a surface will be separated into a v
Suppose you have a mass m attached to a spring with spring constant k. The mass rests on a
horizontal frictionless surface. Its equilibrium position is at x = 0. It is pulled a distance A and
released.
a.
b.
c.
d.
What is its speed as it passes the positi