In Young's experiment, light of wavelength 4000 Å is used to produce bright fringes of width 0.6 mm, at a distance of 2 meters. If the whole apparatus is dipped in a liquid of refractive index 1.5, then fringe width will be

(1) 0.2 mm

(2) 0.3 mm

(3) 0.4 mm

(4) 1.2 mm

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In Young's double-slit experiment, the phase difference between the light waves reaching the third bright fringe from the central fringe will be (λ =6000 Å )

(1) Zero

(2) 2$\pi$

(3) 4$\pi$

(4) 6$\pi$

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In two separate set - ups of the Young's double slit experiment, fringes of equal width are observed when lights of wavelengths in the ratio 1 : 2 are used. If the ratio of the slit separation in the two cases is 2 : 1, the ratio of the distances between the plane of the slits and the screen in the two set - ups is

(1) 4 : 1

(2) 1 : 1

(3) 1 : 4

(4) 2 : 1

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In a biprism experiment, by using light of wavelength 5000 Å, 5 mm wide fringes are obtained on a screen 1.0 m away from the coherent sources. The separation between the two coherent sources is

(1) 1.0 mm

(2) 0.1 mm

(3) 0.05 mm

(4) 0.01 mm

Concept Questions :-

Diffraction
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The slits in a Young's double-slit experiment have equal widths and the source is placed symmetrically relative to the slits. The intensity at the central fringes is I0. If one of the slits is closed, the intensity at this point will be

(1) I0

(2) I0 / 4

(3) I0 / 2

(4) 4I0

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A thin mica sheet of thickness 2×10–6 m and refractive index (μ = 1.5) is introduced in the path of the first wave. The wavelength of the wave used is 5000 Å. The central bright maximum will shift

(1) 2 fringes upward

(2) 2 fringes downward

(3) 10 fringes upward

(4) None of these

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In Young's double slit experiment, 62 fringes are seen in visible region for sodium light of wavelength 5893 Å. If violet light of wavelength 4358 Å is used in place of sodium light, then number of fringes seen will be

(1) 54

(2) 64

(3) 74

(4) 84

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In Young's double slit experiment, angular width of fringes is 0.20o for sodium light of wavelength 5890 Å. If complete system is dipped in water, then angular width of fringes becomes

(1) 0.11o

(2) 0.15o

(3) 0.22o

(4) 0.30o

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In Young's double slit experiment, the distance between the two slits is 0.1 mm and the wavelength of light used is 4×10–7 m. If the width of the fringe on the screen is 4 mm, the distance between screen and slit is

(1) 0.1 mm

(2) 1 cm

(3) 0.1 cm

(4) 1 m

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In Young's double slit experiment using sodium light (λ = 5898 Å), 92 fringes are seen. If given colour (λ = 5461 Å) is used, how many fringes will be seen

(1) 62

(2) 67

(3) 85

(4) 99

Concept Questions :-

Young Double slit experiment