Questions from Modern Physics

Q: A beam of light traveling horizontally is made of an unpolarized component

A beam of light traveling horizontally is made of an unpolarized component with intensity I0 and a polarized component with intensity Ip. The plane of polarization of the polarized component is orient...

Q: Equation (31.9) says that vab = L di

Equation (31.9) says that vab = L di/dt (see Fig. 31.8a). Using Faraday’s law, explain why point a is at higher potential than point b when i is in the direction shown in Fig. 31.8a...

Q: In an L-R-C series ac circuit, the

In an L-R-C series ac circuit, the source has a voltage amplitude of 240 V, R = 90.0 Ω, and the reactance of the inductor is 320 Ω. The voltage amplitude across the resistor is 135 V. a. What is the...

Q: A secondary rainbow is formed when the incident light undergoes two internal

A secondary rainbow is formed when the incident light undergoes two internal reflections in a spherical drop of water as shown in Fig. 33.19e. (See Challenge Problem 33.60.) a. In terms of the incide...

Q: First, light with a plane of polarization at 45° to

First, light with a plane of polarization at 45° to the horizontal shines on the insect. Which statement is true about the two types of cells? a. Both types detect this light. b. Neither type detect...

Q: Next, unpolarized light is reflected off a smooth horizontal piece of

Next, unpolarized light is reflected off a smooth horizontal piece of glass, and the reflected light shines on the insect. Which statement is true about the two types of cells? a. When the light is d...

Q: To vary the angle as well as the intensity of polarized light

To vary the angle as well as the intensity of polarized light, ordinary unpolarized light is passed through one polarizer with its transmission axis vertical, and then a second polarizer is placed bet...

Q: You sight along the rim of a glass with vertical sides so

You sight along the rim of a glass with vertical sides so that the top rim is lined up with the opposite edge of the bottom (Fig. P33.45a). The glass is a thin-walled, hollow cylinder 16.0 cm high. Th...

Q: You are given this table of data recorded for a circuit that

You are given this table of data recorded for a circuit that has a resistor, an inductor with negligible resistance, and a capacitor, all in series with an ac voltage source: Here f is the frequency...

Q: In an L-R-C series circuit the current is

In an L-R-C series circuit the current is given by i = I cos ωt. The voltage amplitudes for the resistor, inductor, and capacitor are VR, VL, and VC. a. Show that the instantaneous power into the res...