Unified Assignment 2 _ G10.55

Light of wavelength 300 nm shines through a single slit of width 2 μm and falls on a flat screen, located 3.0 m from the slit.

Which of the following is true regarding the

diffraction pattern?

• The central band is wider and brighter than

  the other bands

• The central band is wider and dimmer than

  the other bands

• The central band is narrower and brighter

  than the other bands

• The central band is narrower and dimmer

  than the other bands

Light of wavelength 300 nm shines through a single slit of width 2 μm and falls on a flat screen, located 3.0 m from the slit.

What is the width of the central band?

• 3.0 X 10^-1 m

• 4.5 X 10^-1 m

• 6.0 X 10^-1 m

• 9.0 X 10^-1 m

Light of wavelength 300 nm shines through a single slit of width 2 μm and falls on a flat screen, located 3.0 m from the slit. Which of the following corresponds to the 4th dark band?

• sin 𝜃 = 5.0 X10^-1

• sin 𝜃 = 6.0 X10^-1

• sin 𝜃 = 7.0 X10^-1

• sin 𝜃 = 9.0 X10^-1

Monochromatic light contains light waves that ______.

• are always in phase

• are always opposite phase

• have the same wavelength

• have different wavelengths

The path difference d is measured for many pairs of interfering light waves in a double-slit experiment. If the wavelength of the light is 120 nm, which of the following corresponds to a destructive interference?

• 120 nm

• 180 nm

• 240 nm

• 360 nm

Light of wavelength 𝜆 falls on two slits separated by a distance d. The first bright band in observed at a distance y from the center, on a screen located at a distance L from the slits. What would be the position of the first bright band if the distance between the slits is doubled?

• y/4

• y/2

• 2y

• 4y

For an electromagnetic wave, we define the direction of polarization to be the direction ____.

• parallel to the electric field

• parallel to the magnetic field

• perpendicular to the electric field

• parallel to the direction of the wave

Unpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 45° with the axis of the polarizer. What fraction of the original light is transmitted through the analyzer?

• I_o

• I_o/4

• I_o/2

• 4I_o

A laser light of wavelength 500 nm falls on a diffraction grating that has 2500 slits/cm.

What is the slit spacing?

• 2 µm

• 4 µm

• 6 µm

• 8 µm

A laser light of wavelength 500 nm falls on a diffraction grating that has 2500 slits/cm.

What order of bright fringe is observed at an angle of 15°?

• m = 1

• m = 2

• m = 3

• m = 4