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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.
Inertia with a stone You will require a stone weighing about 1 kg for this experiment. Wrap a length of heavy string about the stone. Now, on opposite sides of the stone, join
What is force
They are exactly analogous to water pressure and water flow by a hose. That's why flowing electrons is known as a current, just like a water current. Voltage is the electromotiv
Properties of cement mortar 1. It should make good adhesion with building units like bricks, stones etc. 2. It should be capable of resisting penetration of water. 3. It s
According to de-Broglie theory, the wavelength of de-Broglie wave is given by Where h = Plank's constant, m = Mass of the particle, v = Speed of the particle, E = Energy of
A 25 N box is pulled vertically upward by means of a cord.Find the acceleration of the box if the tension in the cord is 35 N.
A 15-kg child experiences an acceleration of 0.25 m/s2 as she is pulled 1.7 m horizontally across the floor by her sister. Calculate the change in the child's kinetic energy.
It is significant to denote the time interval to in which we are talking about average. In a given time interval t 1 to t 2 the average angular acceleration is defined as ,
Einstein-Podolsky-Rosen effect; EPR effect: Assume the following quantum mechanical thought-experiment: Take a particle that is at rest and contain spin zero. It decays sponta
Q. Illustrate how do fireworks turn into shapes like hearts as well as stars? Answer:- The fireworks creators have worked several decades to figure these things out. There
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