1
KCET 2018
MCQ (Single Correct Answer)
+1
-0
In Young's double slit experiment, slits are separated by 2 mm and the screen is placed at a distance of 1.2 m from the slits. Light consisting of two wavelengths $$6500\mathop A\limits^o $$ and $$5200\mathop A\limits^o $$ are used to obtain interference fringes. Then, the separation between the fourth bright fringes of two different patterns produced by the two wavelengths is
A
0.312 mm
B
0.123 mm
C
0.213 mm
D
0.412 mm
2
KCET 2017
MCQ (Single Correct Answer)
+1
-0
According to Huygens' principle, during refraction of light from air to a denser medium
A
Wavelength decreases but speed increases
B
Wavelength increases but speed decreases
C
Wavelength and speed increases
D
Wavelength and speed decreases
3
KCET 2017
MCQ (Single Correct Answer)
+1
-0
In a system of two crossed polarisers, it is found that the intensity of light from the second polariser is half from that of first polariser. The angle between their pass axes is
A
$60^{\circ}$
B
$30^{\circ}$
C
$0^{\circ}$
D
$45^{\circ}$
4
KCET 2017
MCQ (Single Correct Answer)
+1
-0
During scattering of light, the amount of scattering in inversely proportional to................ of wavelength of light.
A
square
B
fourth power
C
half
D
cube
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