1
JEE Main 2021 (Online) 25th July Morning Shift
+4
-1
In the Young's double slit experiment, the distance between the slits varies in time as
d(t) = d0 + a0 sin$$\omega$$t; where d0, $$\omega$$ and a0 are constants. The difference between the largest fringe width and the smallest fringe width obtained over time is given as :
A
$${{2\lambda D({d_0})} \over {(d_0^2 - a_0^2)}}$$
B
$${{2\lambda D{a_0}} \over {(d_0^2 - a_0^2)}}$$
C
$${{\lambda D} \over {d_0^2}}{a_0}$$
D
$${{\lambda D} \over {{d_0} + {a_0}}}$$
2
JEE Main 2021 (Online) 20th July Evening Shift
+4
-1
With what speed should a galaxy move outward with respect to earth so that the sodium-D line at wavelength 5890 $$\mathop A\limits^o$$ is observed at 5896 $$\mathop A\limits^o$$ ?
A
306 km/sec
B
322 km/sec
C
296 km/sec
D
336 km/sec
3
JEE Main 2021 (Online) 18th March Morning Shift
+4
-1
In Young's double slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The distance between the first and the third bright fringe formed when the slits are illuminated by a monochromatic light of 5890 $$\mathop A\limits^o$$ is :-
A
1178 $$\times$$ 10$$-$$9 m
B
1178 $$\times$$ 10$$-$$6 m
C
1178 $$\times$$ 10$$-$$12 m
D
5890 $$\times$$ 10$$-$$7 m
4
JEE Main 2021 (Online) 26th February Morning Shift
+4
-1
In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation will be :
A
0.50 mm
B
0.25 mm
C
1 mm
D
0.75 mm
JEE Main Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination