Polarization: Unpolarized light of intensity I0 passed through an ideal polarizing sheet with its polarizing axis at the 12 o'clock position and then through a second ideal sheet with its polarizing axis at the 1 o'clock position. What is the intensity of the emerging light in terms of I0?
Fill in the blank(s) with the appropriate word(s).
(3/8) I0
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A negatively charged particle is moving in the +x-direction when it enters a region with a uniform electric field pointing in the +x-direction. Which graph gives its position as a function of time correctly? (Its initial position is x = 0 at t = 0.)
A.
B.
C.
D.
E.
What is one relationship of superconductors to magnets?
a. Superconductors draw in their own magnetic fields and thus attract magnets. b. Superconductors affect nearby magnetic fields. c. Superconductors expel their own magnetic fields and thus repel magnets. d. Superconductors have no more relation to magnetic fields than ordinary conductors. e. Superconductors can be used to create magnetic monopoles.
Light spreads out when it passes through a narrow slit because of interference
Indicate whether the statement is true or false
Diffraction Gratings: A metallic sheet has a large number of parallel slits, 5.0 mm wide and 20 cm apart. This sheet is used as a diffraction grating for microwaves. A wide parallel beam of microwaves is incident normally on the sheet. What is the smallest microwave frequency for which only the central maximum will occur? (c = 3.00 × 108 m/s)
A. 0.50 GHz B. 0.70 GHz C. 1.0 GHz D. 1.5 GHz E. 2.0 GHz