Sodium light has two wavelength `lambda_1 = 589 nm and lambda_2= 589.6 nm`. As the path difference increases, when is the visibility of the fringes a minimum?

In Young wavelength lambda , the intensity of light at a point on the screen where path difference is lambda , is K units. What is the intensity of light at a point where path difference is lambda/3 ?

A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes in a Young experiment.- Find the distance of the third bright fringe on the screen from the central maximum for wavelength 650 nm.

In an ideal double slit experiment when a glass plate having refractive index 1.5 and thickness t is placed in the path of interfered light rays of wavelength lambda then the intensity remains unchanged at the place where the central maximum was previously formed. Then the minimum thickness of the glass plate is

A beam of light consisting of two wavelengths, 650 nm and 520 nm,is used to obtain interference fringes in a Young experiment.-What is the least distance from the central maximum where the bright fringes due to both the wavelengths coincide?

There are two sources of light, each emitting with a power of 100 W. One emits X-rays of wavelength 1nm and the other visible light of 500 nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given wavelength?

in a Youing's double slit experiment,bicromatic light of wavelengths 400 nm and 560 nm are used.The distance between the slits is 0.1 mm and the distance between the plane of the slits and screen is 1.0m. the minimum distance between two successive regions of complete darkness is

In a double slit experiment the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be seen on the screen one due to light with wavelength 480 nm, and the other due to light with wavelength 600 nm. what is the separation on the screen between the fifth order bright frings of the two interference patterns?

9 A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1 m away. It is observed that the first minimum is at a distance of 2.5 mm from the centre of the screen. Find the width of the slit.

In Young's double slit experiment,two slits are separated by 3 mm distance and illuminated by ligth of wavelength 480 nm.The screen is at 2 m from the plane of the slits.Calculate the separtion between the 8th bright finge and the 3rd dark fringe obsrved with respect to the central brigth fringe.