In a physics lab, light with a wavelength of 520 nm travels in air from a laser to a photocell in a time of 16.6 ns . When a slab of glass with a thickness of 0.850 m is placed in the light beam, with the beam incident along the normal to the parallel faces of the slab, it takes the light a time of 21.6 ns to travel from the laser to the photocell. What is the wavelength of the light in the glass?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?