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Worksheet: Double-Slit Interference

Q1:

Calculate the wavelength of light that produces its first minimum at an angle of when falling on a single slit of width 1.00 μm.

Q2:

Light of wavelength mm is incident on double-slits 0.100 mm apart. Calculate the angle that corresponds to the third-order maximum of the diffracted light.

Q3:

What is the highest-order maximum for 400-nm light falling on double slits separated by 25.0 μm?

Q4:

Two slits apart are illuminated by light of wavelength 600 nm. What is the highest order fringe in the interference pattern?

Q5:

What is the wavelength of light falling on double slits separated by 2.00 μm if the third-order maximum is at an angle of ?

Q6:

In a double-slit experiment, the fifth maximum is 2.8 cm from the central maximum on a screen that is 1.5 m away from the slits. If the slits are 0.15 mm apart, what is the wavelength of the light being used?

Q7:

The interference pattern of a He-Ne laser light passing through two slits 0.031 mm apart is projected on a screen 10.0 m away. Determine the distance between the adjacent bright fringes.

Q8:

A double-slit experiment is to be set up so that the bright fringes appear 1.27 cm apart on a screen 2.13 m away from the two slits. The light source was wavelength 500 nm. What should be the separation between the two slits?

Q9:

Light of wavelength 710 nm illuminates a double slit with a slit separation of 0.150 m. Light from the slits is incident on a screen 3.00 m away.

Find the distance on the screen between the central maximum and the third maximum of the diffraction pattern.

Find the distance on the screen between the second maximum and the fourth maximum of the diffraction pattern.