1
NEET 2013
+4
-1
In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths $${\lambda _1}$$ = 12000 $$\mathop A\limits^ \circ$$ and $${\lambda _2}$$ = 10000 $$\mathop A\limits^ \circ$$. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other ?
A
4 mm
B
3 m
C
8 mm
D
6 mm
2
AIPMT 2007
+4
-1
The frequency of a light wave in a material is 2 $$\times$$ 1014 Hz and wavelength is 5000 $$\mathop A\limits^ \circ$$. The refractive index of material will be
A
1.50
B
3.00
C
1.33
D
1.40
3
AIPMT 2005
+4
-1
The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 $$\mathop A\limits^ \circ$$ is of the order of
A
B
10$$-$$2 rad
C
10$$-$$4 rad
D
10$$-$$6 rad.
4
AIPMT 2004
+4
-1
A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000 $$\mathop A\limits^ \circ$$, is of the order of
A
0.5 m
B
5 m
C
5 mm
D
5 cm
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