Laser light sent through a double slit produces an interference patter on a screen 3.00 m from the slits.If the tenth order maximum occurs at an angle of 41.9°,at what angle does the third order maximum occur?
A) No third order maximum occurs.
B) 0.20°
C) 11.6°
D) 12.6°
E) Not enough information is given.

Question

Laser light sent through a double slit produces an interference patter on a screen 3.00 m from the slits.If the tenth order maximum occurs at an angle of 41.9°,at what angle does the third order maximum occur?
A) No third order maximum occurs.
B) 0.20°
C) 11.6°
D) 12.6°
E) ​Not enough information is given.

Quizplus · Accepted Answer

The angle for the m-th order maximum in a double-slit interference pattern is given by the formula $d \sin \theta_m = m \lambda$. Since the tenth order maximum occurs at 41.9°, we can use this information to find the wavelength or slit separation ratio. For the third order maximum, we use the same ratio to find the angle, which results in 11.6°.

Laser Light Sent Through a Double Slit Produces an Interference