Questions from Modern Physics

Q: Light is incident along the normal on face AB of a glass

Light is incident along the normal on face AB of a glass prism of refractive index 1.52, as shown in Fig. E33.21. Find the largest value the angle a can have without any light refracted out of the pri...

Q: Physicians use high-frequency (f = 1-5 MHz

Physicians use high-frequency (f = 1-5 MHz) sound waves, called ultrasound, to image internal organs. The speed of these ultrasound waves is 1480 m/s in muscle and 344 m/s in air. We define the index...

Q: Because the speed of light in vacuum (or air) has

Because the speed of light in vacuum (or air) has such a large value, it is very difficult to measure directly. To measure this speed, you conduct an experiment in which you measure the amplitude of t...

Q: In a physics lab, light with wavelength 490 nm travels in

In a physics lab, light with wavelength 490 nm travels in air from a laser to a photocell in 17.0 ns. When a slab of glass 0.840 m thick is placed in the light beam, with the beam incident along the n...

Q: In an L-R-C series circuit the magnitude of

In an L-R-C series circuit the magnitude of the phase angle is 54.0°, with the source voltage lagging the current. The reactance of the capacitor is 350 Ω, and the resistor resistance is 180 Ω. The av...

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

In an L-R-C series circuit, the phase angle is 40.0°, with the source voltage leading the current. The reactance of the capacitor is 400 Ω, and the resistance of the resistor is 200 Ω. The average pow...

Q: A cylindrical conductor with a circular cross section has a radius a

A cylindrical conductor with a circular cross section has a radius a and a resistivity ρ and carries a constant current I. a. What are the magnitude and direction of the electric field vector E at a...

Q: The 19th-century inventor Nikola Tesla proposed to transmit electric power

The 19th-century inventor Nikola Tesla proposed to transmit electric power via sinusoidal electromagnetic waves. Suppose power is to be transmitted in a beam of cross-sectional area 100 m2. What elect...

Q: Interplanetary space contains many small particles referred to as interplanetary dust.

Interplanetary space contains many small particles referred to as interplanetary dust. Radiation pressure from the sun sets a lower limit on the size of such dust particles. To see the origin of this...

Q: An L-R-C series circuit consists of a 2

An L-R-C series circuit consists of a 2.50-µF capacitor, a 5.00-mH inductor, and a 75.0-Ω resistor connected across an ac source of voltage amplitude 15.0 V having variable frequency. a. Under what c...