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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.
What is a fiber optic sensor? Fiber optic sensor: A fiber optic sensor is a sensor which uses optical fiber either like the sensing tool ("intrinsic sensors"), or implies as
a rocket is projected upwards with a velocity of 490. find te time taken to reach the ground
a ball is thrown upward from the top of a building 60m hign with an initial velocity of 49.0 m/s. when is the ball 78.4 meters above its starting point?
population inversion The process in which the number of electrons (N 2 ) in a higher energy state called ‘metastable state of an active medium is increased to a value greate
INDUCTOR:- An inductor (also choke, coil, or reactor) is a passive two-terminal electrical component that stores energy in its magnetic field. For comparison, a capacitor stores en
Q. Write any three applications of laser in industry. Industrial applications (i) The laser beam is utilized to drill extremely fine holes in diamonds hard sheets etc.
OHM’S LAW: So far you have been introduced to the concepts of electric current (as a movement of free electrons through a conducting material), voltage (or potential) and poten
When the electron is known energy from external source, it goes to higher energy level. This process is called as excitation. The minimum energy needed to excite an atom is know
What is Electron Holography? Electron holography is an application of holography procedures to electron waves quite than light waves. Electron holography was invented through D
A certain machine exerts a force of 200 newtons on a box whose mass is 30 kilograms. The machine moves the box a distance of 20 meters along a horizontal floor. What amount of wor
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