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We know light speed (average) gets slow while in transparent materials like glass and water. And fraction of it gets absorbed as a heat (K.E. of molecules of glass). But my question is that How it can then leaving glass slab or any glass material comes to it's normal speed again? If light is absorbed in the material as heat then some light energy must be lost there, and after emanating from denser (glass) to back rare (air) where does this compensation of "speed" and energy comes from?
a metallic sphere has a charge of 4.5 nc. a negatively charged rod has a charge of -6.0 nc. when the rod touches the
A wire has a diameter of 1.35 mm and a length of 35.6 m, and is found to have a resistance of 1.3 capital omega. What is the resistivity of the wire
Three identical freight cars are sitting on the tracks, each separated by a small distance. A fourth car is coasting with velocity 4 m/s. How fast are the four cars moving
Because it can go from rest to 27.0 m/s (about 60 mi/h) in 4.0 s, one of the fastest-accelerating animals is the cheetah. determine the average power developed by the cheetah
Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, What is the emf of this solar cell
1. What are the differences between PSK and DPSK 2. What device can be used for generation of FSK signal
A circular loop of wire with 10 turns, radius 0.241 m and resistance 0.235 Ohms is connected to a 13.1 V power supply. find The magnetic field at the center of this loop
A total electric charge of 4.50 nC is distributed uniformly over the surface of a metal sphere with a radius of 22 cm. The potential is zero at a point at infinity. Find the value of the potential at 45 cm from the center of the sphere.
A block with mass m =7.0 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.28 m. While at this equilibrium position, the mass is then given an initial push downward at v = 4.1 m/s. The block oscillat..
General relativity says that the total orbital energy of the binary system consisting of two neutron stars will decrease over time through the emission of gravitational waves. If this happens slowly sufficient that the orbit stays circular, response ..
A diverging lens is utilized to form a virtual image of an object. The object is 55 cm in front of the lens and the image is 27.5 cm in front of the lens. Decide the focal length of the lens.
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.0 MJ, What is the moment of inertia of the flywheel
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