KCET SERIES Physics
Single Slit Diffraction
6 previous year questions.
Volume: 6 Ques
Yield: Medium
High-Yield Trend
2
2021 1
2015 1
2009 1
2006 1
2004 Chapter Questions 6 MCQs
01
PYQ 2004
medium
physics ID: kcet-200
When light is incident on a diffraction grating the zero order principal maximum will be _____
1
one of the component colours
2
absent
3
spectrum of the colours
4
white
02
PYQ 2006
medium
physics ID: kcet-200
The width of the diffraction band varies
1
inversely as the wavelength
2
directly as the width of the slit
3
directly as the distance between the slit and the screen
4
inversely as the size of the source from which the slit is illuminated
03
PYQ 2009
easy
physics ID: kcet-200
A beam of light of wavelength 600 nm from a distant source falls on a single slit I mm wide and the resulting diffraction-pattern is observed on a screen 2m away. The distance between the first dark fringes on either side of the central bright fringe is
1
1.2 cm
2
1.2 mm
3
2.4cm
4
2.4mm
04
PYQ 2015
easy
physics ID: kcet-201
To observe diffraction, the size of the obstacle
1
has no relation to wavelength.
2
should be where is the wavelength
3
should be much larger than the wavelength
4
should be of the order of wavelength
05
PYQ 2021
medium
physics ID: kcet-202
Which of the statements are correct with reference to single slit diffraction pattern?
(i) Fringes are of unequal width
(ii) Fringes are of equal width
(iii) Light energy is conserved
(iv) Intensities of all bright fringes are equal
(i) Fringes are of unequal width
(ii) Fringes are of equal width
(iii) Light energy is conserved
(iv) Intensities of all bright fringes are equal
1
(i) and (iii)
2
(i) and (iv)
3
(ii) and (iv)
4
(ii) and (iii)
06
PYQ 2021
medium
physics ID: kcet-202
A slit of width ‘a’ is illuminated by red light of wavelength 6500 A°. If the first diffraction minimum falls at 30°, then the value of ‘a’ is ________
1
6.5 × 10-4 mm
2
1.3 micron
3
3250 A°
4
2.6 × 10-4 cm