College Physics

65.When the 20.0 A current through an inductor is turned off in 1.50 ms, an 800 V emf is induced, opposing the change. What is t ...

96.To receive AM radio, you want anRLCcircuit that can be made to resonate at any frequency between 500 and 1650 kHz. This is ac ...

24 ELECTROMAGNETIC WAVES Figure 24.1Human eyes detect these orange “sea goldie” fish swimming over a coral reef in the blue wate ...

Misconception Alert: Sound Waves vs. Radio Waves Many people confuse sound waves withradio waves, one type of electromagnetic (E ...

Maxwell’s Equations Electric field linesoriginate on positive charges and terminate on negative charges. The electric field is ...

Figure 24.4The apparatus used by Hertz in 1887 to generate and detect electromagnetic waves. AnRLCcircuit connected to the first ...

Electric and Magnetic Waves: Moving Together Following Ampere’s law, current in the antenna produces a magnetic field, as shown ...

E (24.3) B =c is the ratio ofE-field strength toB-field strength in any electromagnetic wave. This is true at all times and at a ...

Table 24.1Electromagnetic Waves Type of EM wave Production Applications Life sciences aspect Issues Radio & TV Accelerating ...

Transmission, Reflection, and Absorption What happens when an electromagnetic wave impinges on a material? If the material is tr ...

Figure 24.12Amplitude modulation for AM radio. (a) A carrier wave at the station’s basic frequency. (b) An audio signal at much ...

(24.8) λ = 3.00×10 (^8) m/s 1530×10^3 cycles/s = 196 m. (b) For the f= 105.1 MHzFM radio signal, (24.9) λ = 3.00×10 (^8) m/s 105 ...

Microwaves Microwavesare the highest-frequency electromagnetic waves that can be produced by currents in macroscopic circuits an ...

We can examine radiant heat transfer from a house by using a camera capable of detecting infrared radiation. Reconnaissance sate ...

m = ρV (24.14) = (1000 kg/m^3 )(area×thickness(m^3 )) = (1000 kg/m^3 )(π(0.80× 10 – 3m)^2 / 4)(0.30× 10 –^6 m) = 0.151× 10 – 9kg ...

Unfortunately, today we are observing a depletion in ozone concentrations in the upper atmosphere. This depletion has led to the ...

Figure 24.18Artist’s conception of an electron ionizing an atom followed by the recapture of an electron and emission of an X-ra ...

Figure 24.20This shadow X-ray image shows many interesting features, such as artificial heart valves, a pacemaker, and the wires ...

Figure 24.21This is an image of theγrays emitted by nuclei in a compound that is concentrated in the bones and eliminated throug ...

24.4 Energy in Electromagnetic Waves Anyone who has used a microwave oven knows there is energy inelectromagnetic waves. Sometim ...