Question

If one of the two slits of a Young’s double-slit experiment is painted so that it transmits half the light intensity as the second slit, then  

Solution

Correct option is

Dark fringes will become brighter and bright fringes darker

The contrast between bright and dark fringes is determined by intensity ratio. 

SIMILAR QUESTIONS

Q1

A thin film of refractive index 1.5 and thickness 4 × 10–5 cm is illuminated by light normal to the surface. What wavelength within the visible spectrum will be intensified in the reflected beam?

Q2

A plane wave of monochromatic light falls normally on a uniform thin film of oil which covers a glass plate. The wavelength of source can be varied continuously. Complete destructive interference is observed for λ = 5000Ã… and λ = 1000 Ã… and for no other wavelength in between. If μ of oil is 1.3 and that of glass is 1.5, the thickness of the film will be  

Q3

A light ray frequency v and wavelength λ enters a liquid of refractive index . The ray travels in the liquid with  

Q4

In a double-slit experiment, instead of taking slits of equal width, one slit is made twice as wide as the other. Then, in the interference pattern

Q5

Light of wavelength λ = 5890 Ã… falls on a double-slit arrangement having separation d = 0.2 mm. A thin lens of focal length f = 1 m is placed near the slits. The linear separation of fringes on a screen placed in the focal plane of the lens is   

Q6

In Young’s double-slit experiment, the two slits act as coherent sources of equal amplitude A and of wavelength λ. In another experiment with the same setup, the two slits are sources of equal amplitude A and wavelengthλ, but are incoherent. The ratio of intensity of light at the mid-point of the screen in the first case to that in the second case is  

Q7

In Young’s double-slit interference experiment, if the slit separation is made threefold, the fringe width becomes 

Q8

Sources 1 and 2 emit lights of different wavelengths whereas 3 and 4 emit lights of different intensities. The coherence

Q9

In Young’s double-slit experiment, the two slits act as coherent sources of equal amplitude A and of wavelength λ. In another experiment with the same setup, the two slits are sources of equal amplitude A and wavelengthλ, but are incoherent. The ratio of intensity of light at the mid-point of the screen in the first case to that in the second case is

Q10

A wave front AB passing through a system C emerges as DE. The systemC could be