An unpolarized beam of light is incident on a pane of glass (n = 1.69) such that the reflected component coming off the glass is completely polarized. What is the angle of incidence in this case?
a. 53.7°
b. 7.33°
c. 1.04°
d. 59.4°
e. 36.3°
d
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The circuit below contains 3 100-W light bulbs and a capacitor. The emf is 110 V. Which light bulb(s) is(are) brightest? (Assume the capacitor is fully charged.)
A. A B. B C. C D. A and B E. All three are equally bright.
A body is oscillating up and down at the end of a spring. Let's consider when the body is at the top of its up and down motion The displacement vector from the equilibrium position points up
Indicate whether the statement is true or false
A resistor is connected to an ideal ac power supply. (a) The phase angle between the current and voltage is
A) 0 B) ?/2 radians. C) -?/2 radians. D) ? radians. E) 3?/4 radians. (b) The current in the resistor A) leads the voltage across the resistor by 90°. B) lags the voltage across the resistor by 90°. C) is in phase with the voltage across the resistor. D) the voltage across the resistor by 45°. E) lags the voltage across the resistor by 45°. (c) How does the average power dissipated in the resistor change as the frequency in the ac power supply decreases? A) It decreases. B) It increases. C) It does not change. D) It increases or decreases depending on the sign of the phase angle. What will be an ideal response?
Characteristic x-ray spectra come from