Light of wavelength 6328 is incident on a slit having a width 0.2 mm. The width of the central maximum, measured from minimum to minimum is:

Which of the following phenomenon is not common to sound and light waves?

In Young's double slit experiment using identical slits, the intensity at a bright fringe is I₀. If one of the slits is now convered, intensity at any point on the screen will be :

In Young's double slit experiment, the seventh maximum with wavelength λ₁ is at a distance d₁ and the same maximum with wavelength λ₂ is a distance d₂. Then d₁/d₂

Two sodium lamps are used in an interference experiment. The intensity produced by both lamps individually on the screen is I. The ratio of intensity of maxima to intensity of minima on the screen is

If a star is moving towards earth,then the lines are shifted towards

In a certain double slit experimental arrangement, interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another of wavelength 6000 Å, the fringe width will be

Air has a refractive index 1.0003. The thickness of air column, which will have one more wavelength of yellow light (6000 Å) than in the same thickness in vacuum is

In a Young's double slit experiment the intensity at a point where the path difference is λ/6 (λ being the wavelength of the light used) is I. If I₀ denotes the maximum intensity. I/I₀ is equal to 

Specific rotation of sugar solution is 0.01 rad-m² / kg. If 200kg/m³ of impure sugar solution is taken in a polarimeter tube of length 0.25m and an optical rotation of 0.4 rad is observed, then the percentage of purity of sugar in the sample is :