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Light is shined into a glass rod. To guarantee the total internal reflection (TIR) happens to all the possible rays, what is the minimum index of refraction n for the glass?
Hint: To make sure all rays TIR inside the rod, you just need to consider an extreme case, i.e., the incident angle q1 (on the top surface of glass rod) equals to 90o.
A charge Q is to be distributed between the objects . what should be the magnitude of the charge on the object so that positive force between the object is maximum?
What is Illumination? A body that gives off light is called luminous, like all those glow-in-the-dark toys, and a body that gives off light when it is heated is called incandes
Mass as a Measure of the Amount of Inertia: All objects resist alters in their state of motion because they have inertia. However some objects have more of a tendency to resist
Electromotive force EMF (ξ) - This is the electrical energy from an ideal battery with no internal resistance. It is also the open circuit value of a battery (no current is drawn
The units that may be derived from fundamental units are known as derived units.
An electron moves perpendicular to Earth's magnetic field with a speed of 1.78 x 10 6 m/s. If the strength of Earth's magnetic field is about 5.00 x 10 -5 T. what is the
What does it mean when a coulomb of charge has a certain number of joules?
what is the equation for work
A standing wave is described by the wave function where x and y are in meters and t is in seconds. (a) Prepare graphs showing y as a function of x for five instants: t = 0, 5 ms,
(i) X-rays are electromagnetic waves with wavelength lie among 0.1Å - 100Å. (ii) X-rays is invisible. (iii) They always go in a straight line with speed of light. (iv) X
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