Optics Answers

The near point of a patient's eye is 50.0cm. What focal length must a corrective lens have to enable the eye to see clearly an object 25cm away? Neglect the eye-lens distance

film of refractive index 1.50 and

thickness 0.25 mm is introduced in the

path of one of the interfering beams of a

Michelson's interferometer. It causes

600 dark fringes to sweep across the

field of view. Calculate the wavelength

of light used.

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?