Optics Answers

Some restaurants cover an entire wall with a large, plane mirror. What effect does this mirror have on

the appearance of the restaurant? Why might restaurants choose to use this strategy?

what is meant by the angle of minimum deviation?

what is meant by the angle of deviation?

A plano convex lens of focal length 25cm is to be made with crown glass of refractive index 1.52. calculate the radius of the curvature of the grinding and polishing tools to be used in the lens

When a thin film of a transparent material of refractive index 1.5 for wavelength 5890 Å is inserted in one of the arms of a Michelson's interferometer, a shift of 65 circular fringes is observed. Calculate the thickness of the film.

Solve the question one in exercise one

You stand on the edge of a canyon 420 m and clap your hands; the echo comes back to you 2.56 sec later. What is the temperature of the air? (γ_air=1.40 and M=28.8gm)

Solution

The speed of sound in a gas is v=√(β/ρ)=√(γRT/M)

⇒T=(Mv^2)/γR=[(2.88×10^(-2) kg)(328 m/s^2 )]⁄([(1.4)(8.31)]=266K=-7℃)

In a Young's double slitexperiment m(th) order and n(th)order of bright fringes are formed at point P on a distant screen if monochromatic source of wavelength 400nm and 600nm are used respectively.The minimum value of m and n are respectively

When light of an unknown polarization is examined with a polaroid it is found to exhibit maximum intensity (I )along y-axis and minimum intensity (2I/3) along x-axis.

The intensity transmitted through a polaroid with pass axis at 45°to y -axis (in x-y plane) is

1)5I/3

2)I/2

3)5I/6

4)I/4

A lightning flash dissipates an enormous amount of energy and is essentially instantaneous. How is the energy transformed into the sound waves of thunder?

A convex lens those two faces has the same radius of curvature has a focal length of 16cm, refractive index of the glass is 1.2. find the radius curvature