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Using Maxwell's equations for free space, show
that light is an electromagnetic wave.
How come y1+y2 is equal to −2.2122 cm+0.5645 cm. I'm confused about this part
The number of atoms of chlorine present in 5.85g of Nacl is ?( Na =23 Cl=35.5)(Avogadro's number=6.02*10
A light source emits visible light of two wavelengths: λ = 430 nm and λ’ = 510 nm. The source is used in a double-
slits interference experiment in which L =1.50 m and d = 0.025 0 mm. Are there any locations on the screen where
the bright fringes from the two wavelengths overlap exactly?
For a certain sinusoidal wave of intensity I, the amplitude of the magnetic field is B. What
would be the amplitude (in terms of B) in a similar wave of twice the intensity?
Is polarization a property of all electromagnetic waves, or is it unique to visible light? Can
sound waves be polarized? What fundamental distinction in wave properties is involved?
Explain.
An inductor, a capacitor, and a resistor are all connected in series across an ac source.
If the resistance, inductance, and capacitance are all doubled, by what factor does each of the following quantities change? Indicate whether they increase or decrease: (a) the resonance angular frequency; (b) the inductive reactance; (c) the capacitive reactance. (d) Does the impedance double?
A hair dryer is treated as a pure resistor. But because there are coils in the heating element and in the motor that drives the blower fan, a hair dryer also has inductance.
Qualitatively, does including an inductance increase or decrease the values of R, Irms, and P?
In an R-C circuit, a resistor, an uncharged capacitor, a dc battery, and an open switch are
in series. In an R-L circuit, a resistor, an inductor, a dc battery, and an open switch are in series. Compare the behavior of the current in these circuits (a) just after the switch is closed and (b) long after the switch has been closed. In other words, compare the way in which a capacitor and an inductor affect a circuit.
Two closely wound circular coils have the same number of turns, but one has twice the
radius of the other. How are the self-inductances of the two coils related? Explain your
reasoning.
