Geometrical OpticsHard
Question
A single slit Fraunhofer diffraction pattern is formed with white light. For what wavelength of light the third secondary maximum in the diffraction pattern coincides with the second secondary maximum in the pattern for red light of wavelength 6500 
: -
: - Options
A.4400
B.4100
C.4642.8
D.9100
Solution
x = 
For red light : x =
× 6500
For other light x =
× λ
x is same for each.
∴ 5 × 6500 = 7 × λ or λ =
× 6500 = 4642.8
For red light : x =
× 6500For other light x =
× λ x is same for each.
∴ 5 × 6500 = 7 × λ or λ =
× 6500 = 4642.8 Create a free account to view solution
View Solution FreeMore Geometrical Optics Questions
...A point source of light S is placed in front of two large mirrors as shown. Which of the following observers will see on...A ray of light passes through equilateral Prism (μ =1.5 ) such that angle of incidence is equal to angle of emergen...When a ray of light is incident normally on a plane mirror then the angle of reflection will be...A par axial beam is incident on a glass (n = 1.5) hemisphere of radius R = 6 cm in air as shown the distance of point of...