Optics Answers

Parallel light consisting of 2 monochromatic radiations of wavelengths 6.0 x 10^(-5) cm and 4.0 x 10^(-5) cm falls normally on a plane transmission grating ruled with 5000 lines per cm. What is the angular separation of the second-order spectra of the two wavelengths?

Coherent microwaves of wavelength 5.00cm enter a tall, narrow window in a building otherwise essentially opaque to the microwaves. If the window is 36.0cm wide, what is the distance from the central maximum to the first-order minimum along a wall 6.50m from the window?

Sound with a frequency of 650Hz from a distant source passes through a doorway. 1.10m wide in a sound absorbing wall. Find

(a) the number and (b) the angular directions of the diffraction minima at listening positions along a line parallel to the wall.

Helium-neon laser light of wavelength 632.8 nm is sent through a 0.300mm wide single slit. What is the width of central maximum on a screen 1.00 m from the slit?

Light of wavelength 587.5 nm illuminates a slit of width 0.75 mm.

(a) At what distance from the slit should a screen be placed if the first minimum in the diffraction pattern is to be 0.85mm from the central maximum?

(b) Calculate the width of the central maximum.

Consider a wave passing through a single slit. What happens to the width of the central maximum of its diffraction pattern as the slit is made half as wide as the first?

A. It becomes one-fourth as wide.

B. It becomes one half as wide

C. Its width does not change

D. It becomes twice as wide.

A Fraunhofer diffraction pattern is produced on a screen located 1.00m from a single slit. If a light source of wavelength 5.00 x 10^(-7) m is used and the distance from the center of the central bright fringe to the first dark fringe is 5.00 x 10^(-3) m, what is the slit width?

The 2 speakers of a boom box are 35.0 cm apart. A single oscillator makes the speaker vibrate in phase at a frequency of 2.00kHz. At what angles, measured from the perpendicular bisector of the line joining the speakers, would a distant observer hear (a) maximum sound intensity?

(b) minimum sound intensity?

(Speed of sound = 340m/s)

Distinguish btw stationary and progressive waves

Two slits are separated by 0.320 mm. A beam of 500nm light strikes the slits, producing an interference pattern. Determine the number of maxima observed in the angular range -30.0degree < s < 30.0degree, where s is an angle