Optics Answers

Consider Young's experiment where two narrow slits are 0.40 mm apart from center to center. The irradiance at each slit is 0.25 W/m^2. Fringes separated by 3.40 mm appear on a screen 2.00 mm away. Write an expression for the irradiance at the screen as a function of x, the displacement from the central axis.

Design a right circular polarizer (of minimum thickness) using sodium nitrate. Provide all the details.

(a) The displacement field D = (D, 0, 0) of an electromagnetic wave in glass, measured in the

units of C/m2

, is described by the following equation:

When an object is placed 20cm in front of a spherical mirror produces an erect image which is 1/4 of the size of the object. Determine the type of the mirror and radius of curvature of the mirror

The sun has a radiated power of 3.9 · 1026 W, a surface temperature of 5800 K and a radius of 6.96 · 108 m. Find out if the sun is radiating like a black body?

A human body has a surface temperature of about 33 ° C and can be considered a black body. a) Calculate at what wavelength the human body has its radiation maximum.

b) Imagine that you are in a room with a certain temperature. What net effect (radiated power minus absorbed power) radiates your body? Make appropriate estimates. (Suppose your body is a black body and it absorbs radiation from all wavelengths)

A straight conductor is located in a homogeneous magnetic field of limited extent as shown in the figure below. Determine the magnetic force acting on the conductor if the current through the conductor I = 3.5 A and the flow density B = 0.10

Many years ago, in the public grid, there was an alternating voltage of the effective value 127

1.On an old lamp from that time is 127 V; 40 W. Today is the mains voltage

effective value 230

2. What would happen if this lamp were used today?

Task 3

An alternating voltage u (V) across a resistor with resistance 10.0  varies with time

t (s) according to equation u = 25.0.sin 100t.

a) Determine the effective value of the voltage.

b) How much energy is converted into the resistor for 1 minute? EB + P / 0/0




Many years ago, in the public grid, there was an alternating voltage of the effective value 127

1.On an old lamp from that time is 127 V; 40 W. Today is the mains voltage

effective value 230

2.What would happen if this lamp were used today?

How to find the refractive index of glass when wavelength of light=650, angle of refraction=28.1, speed of light in air=1c and speed of light in glass=.67c.