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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 figure separated into squares, each of size 1 mm 2 is being viewed at a distance of 9cm by a magnifying lens of local length 10cm, held close to the eye. (i) Illustrate a ray
The points of maximum amplitude are called as antinodes. At ends density and air pressure both are very low.
A boy goes to market with a average speed of 29 km/h.He returns back half the way he went with a average speed of 40 km/h.Find average speed for whole journey.
Explain physically how a p-n junction functions as a rectifier. Ans: When a P-N junction diode is forward-biased and applied voltage is increased from zero, hardly any current
Question: A long straight portion of wire carries an increasing current due northward. Due east of as well as very near the straight wire at the same height as that of the stra
What are ultrasonic drilling and cutting? Explain in short. Ultrasonic Drilling and Cutting Ultrasonic are utilized for making holes into very hard materials as like glass a
If the temperature in a room is 84 degrees at the floor what will it be at a 30 foot ceiling
what is the effect of torque and equilibrium on taps, doors,handle bars and bicycles??
Working of terrestrial telescope
A trick with surface tension Get a used tin can and make five holes in it with a nail. The holes should be very close to the bottom of the can and about five millimetres apart.
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