Angular Position of Fringes in Diffraction
Trending Questions
Q. In a diffraction pattern due to single slit of width a the first minimum is observed at an angle 30 degree when light of wavelength 5000 angstrom is incident on slit the first secondary maximum is observed at an angle of
Q.
Two sources of light are said to be coherent when both give out light waves of the same
Amplitude and constant phase difference
Wavelength and constant phase difference
Intensity and wavelength
Constant phase difference and speed
Q. In double slit experiment the, intensity of light at a point on the screen but the path difference is Lambda is Io. intensity of light at a point where the path difference becomes Lambda/3 is
Q. At the first minimum adjacent to the central maximum of a single slit diffraction pattern the phase difference between the huygens wavelet from the edge of slit and the wavelet from the midpoint of the slit is
Q.
The frequency of X rays depends upon
Velocity of electrons striking the anticathode
Nature of anti cathode
area of anti cathode
both (a) and (b)
Q. Light of wavelength 6000 ∘A is incident normally on a slit of width 24×10−5 cm. What is the angular position of second minimum from central maximum?
- 30∘
- 45∘
- 60∘
- 15∘
Q. in YDSE a film , refractive index 1.6 of thickness 0.01 mm is intriduced in the path of one of the two interfering beams . the centrel fringe moves to a position occupied by the 10th bright fringe earlier. the wavelength of wave
Q. In a single slit diffraction experiment, the width of the slit is doubled. The central maximum of the diffraction pattern will become,
- broader and fainter
- broader and brighter
- narrower and fainter
- narrower and brighter
Q. an optical fibre has core of refractive index 2 and cladding of a refractive index 1.732. At what angle should light enter the fibre so that it suffers TIR at the core cladding interface.
Q. Light of wavelength 560 nm goes through a pinhole of diameter 0.20 mm and falls on a wall at a distance of 2.00 m. What will be the radius of the central bright spot formed on the wall?
Q. Young's double slit experiment is carried out using microwaves of wavelength λ=3 mm. Distance between the slits is d=5 mm and the distance between the plane of slits and the screen is D=100 cm. Find the total number of maxima formed on the screen.
- 3
- 5
- 1
- 2
Q. A metal rod of length 2m has cross sectional area 2A and as shown in figure. The ends are maintained at temperature 1000C and 700C.$ The tem[temperature at middle point C is
- 900C
- 300C
- 450C
- 600C
Q. Suppose an experiment where a monochromatic light is passed through 3 slits as shown in the figure. (Consider 3 parallel rays as shown from the 3 slits) What is the path difference between rays number 1 and 3?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1443465/original_Picture1.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1443465/original_Picture1.png)
- 2dcosθ
- dsinθ
- dcosθ
- 2dsinθ
Q.
Angular width (b) of central maximum of a diffraction pattern on a single slit does not depend upon
[DCE 2000; 01]
Distance between slit and source
Wavelength of light used
Width of the slit
Frequency of light used
Q. what is the advantage in choosing the wave length of a light radiation as a standard of length ?