A pair of slits are illuminated by a coherent source of red light, and the radiation from the slits then illuminates a screen as shown below. The first maximum formed by constructive interference is seen a distance y from the central maximum C.If the light source is changed to blue light, the position of the first maximum will be:Select one:a.Further from the central maximum.b.Closer to the central maximum.c.The same.d.There will be no fringe pattern unless the slit spacing is also changed.

If a pair of slits are illuminated by a coherent source of radiation, and the radiation from the slits then illuminates a screen as shown below. At the centre of pattern C on the screen formed by the slits, the intensity of the radiation will be:Select one:a.Lightb.Darkc.Same uniform intensity as there is no interference fringes formed.

If light illuminates a double slit an interference pattern of alternating bright and dark spots is seen. The intensity of the bright spots is brighter at the centre due to the width of the slits. The bright interference fringes will be readily observed inside the broad central diffraction maximum. Outside this they will be much fainter.A laser of wavelength λ = 650 nm is shone on a pair of slits each of width a = 31 µm. The slit spacing is d = 0.3 mm. The resulting interference pattern is projected on to a screen a distance L= 2.6 m from the double slit.Counting out from the (n= 0) central bright interference fringe, how many more bright interference fringes will be seen before the intensity drops to zero at the edge of the central diffraction maximum.Express your answer to the nearest whole number.

The figure provided shows the light intensity on a viewing screen behind a single slit of width a that is illuminated with red light. What will happen to the width of the central maximum fringe if blue light is used instead? The width decreases. The width remains the same. The width increases.

f light illuminates a double slit an interference pattern of alternating bright and dark spots is seen. The intensity of the bright spots is brighter at the centre due to the width of the slits. The bright interference fringes will be readily observed inside the broad central diffraction maximum. Outside this they will be much fainter.A laser of wavelength λ = 650 nm is shone on a pair of slits each of width a = 17 µm. The slit spacing is d = 0.2 mm. The resulting interference pattern is projected on to a screen a distance L= 2.6 m from the double slit.Counting out from the (n= 0) central bright interference fringe, how many more bright interference fringes will be seen before the intensity drops to zero at the edge of the central diffraction maximum.Express your answer to the nearest whole number.

Coherent light with a wavelength of λ = 500 nm is sent through two parallel slits, each having a width, a = 0.700 µm. The distance between the centres of the slits, d = 2.80 µm. The screen has a semi-cylindrical shape, with its axis at the midline between the slits. Determine the number of maxima.a.12.b.11.c.13.d.10.