Which of these is constant for ALL types of electromagnetic radiation in a vacuum?
A) amplitude
B) wavelength
C) frequency
D) velocity
E) photon energy
D
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A beam of light traveling in air strikes a glass slab at an angle of incidence less than 90°. After entering the glass slab, what does the beam of light do? (There could be more than one correct choice.)
A) I follows the same path as before it struck the glass. B) It follows the normal to the glass slab. C) It bends away from the normal at the point of contact. D) It bends closer to the normal at the point of contact. E) It slows down.
A proton, with mass 1.67 × 10-27 kg and charge +1.6 × 10-19 C, is sent with velocity 7.1 × 104 m/s in the +x direction into a region where there is a uniform electric field of magnitude 730 V/m in the +y direction
What are the magnitude and direction of the uniform magnetic field in the region, if the proton is to pass through undeflected? Assume that the magnetic field has no x-component and neglect gravitational effects.
Some of the energy produced when machines are used is chemical energy, and some energy is lost
What will be an ideal response?
How many steradians are in a sphere?
What will be an ideal response?