In single slit experiment, the width of the slit is reduced. Then, the line width of the principal maxima
decreases but becomes less bright
increases but becomes less bright
decreases but becomes more bright
increases but becomes more bright
If the two slits in Young's double slit experiment are of unequal width, then
the dark fringes are not perfectly dark
the bright fringes will have unequal spacing
the bright fringes will have unequal brightness
the fringes do not appear
The phenomenon of polarizaton shows that light has...... nature
dual
particle
transverse
longitudinal
Which of the following phenomena suppor tthe wave theory of light ?
1, 2 and 3
1, 2 and 4
2, 3 and 4
1, 3 and 4
White light reflected from a soap film (Refractive Index = 1.5) has a maxima at 600 nm and a minima at 450 nm with no minimum in between. Then the thickness of the film is
1
2
3
4
λ1 and λ2 are used to illuminate the slits. β1 and β2 are the corresponding fringe widths. The wavelength λ1 can produce photoelectric effect when incident on a metal. But the wavelength λ2 cannot produce photoelectric effect. The correct relation between β1 and β2 is
β1 < β2
β1 = β2
β1 > β2
β1 ≥ β2
A fringe width of a certain interference pattern is β = 0.002 cm. What is the distance of 5th dark fringe from centre ?
1 × 10-2 cm
11 × 10-2 cm
9 × 10-3 cm
3.28 × 106 cm
C.
9 × 10-3 cm
The distance of 5th dark fringe from centre is given by
as n = 4, for 5th dark fringe
A polarized light of intensity I0 is passed through another polarizer whose pass axis makes an angle of 60° with the pass axis of the former. What is the intensity of emergent polarized light from second polarizer ?
I = I0
I = I0/6
I = I0/5
I0/4
In a Young's double slit experiment, the slit separation is 0.5 mm and the screen is 0.5 m from the slits. For a monochromatic light of wavelength 500 nm, the distance of 3rd maxima from 2nd minima on the other side of central maxima is
22.5 mm
2.75 mm
2.25 mm
2.5 mm
The polarising angle of glass is 57°. A ray of light which is incident at this angle will have an angle of refraction as
43°
25°
38°
33°