Physics question and answers for October 27, 2023
- Q 8 Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source 632 8 nm The distance between the screen and the...
- Q A source S is kept directly behind the slit S in a double slit apparatus What will be the phase difference at P if a liquid of refraction index u...
- Q Consider a YDSE arrangement shown in the figure two transparent glass plates each of thickness t and refractive index 1 2 1 4 are placed in front of slits S...
- Q 4 The three regions shown in Fig 1 are all lossless and nonmagnetic Determine the standing wave ratio for E in the left region when d equals a 0 b...
- Q 25 Two coherent sources of light are placed at points 5a 2 0 and 5a 2 0 Wavelength of the light is 4a 3 How many maximas will be obtained...
- Q 3 10 cm divergent cm convergent 4 The wavelength of light used in two young s double slit experiments are 400 nm and 500 nm If the fringe width are...
- Q A diverging lens of focal length 20 cm having refractive index 1 5 is immersed in a liquid of refractive index 3 The focal length and nature of the lens...
- Q A student and his lab partner create a single slit by carefully aligning two razor blades to a separation of 0 460 mm When a helium neon laser at 594...
- Q A ray of light is successively deflected from two plane mirrors inclined to each other at a certain angle If the total deviation in the path of the rays reflected...
- Q In Young s double slit experiment 500nm d 1mm D 1m Minimum distance from the central maximum for which intensity is half of the maximum intensity is a 2 5...
- Q Two coherent point sources S and S emit light of wavelength A The separation between the sources is 3 Consider a line passing through S and perpendicular to the line...
- Q 5 A galaxy moving with speed 150 km s shows blue shift At what wavelength sodium line of 580 0 nm will be observed 1 580 29 nm 3 581...
- Q A screen is placed above a plane mirror with its surface parallel to mirror If a point source is placed just above the plane mirror then fringe pattern obtained on...
- Q Monochromatic light is incident on a plane interface AB between two media of refractive indices and H2 2 at an angle as shown in figure The angle is infinitesimally greater...
- Q In a Young s double slit experiment light consisting of two wavelengths 500 nm and 22 700 nm is incident normally on the slits Find the distance from the central...
- Q Figure shows a Young s double slit experiment set up The source S of wavelength 4000 A oscillates along y axis according to the equation y sin t IS IS...
- Q A ray of light is incident at the origin at an angle 60 with Y axis as shown in figure The 2 refractive index is a function of y according...
- Q 5 In YDSE the two slits are separated by 0 1 mm and they are at 0 5 m distance from the screen The wavelength of light used is 5000...
- Q A parallel monochromatic light 600nm falls normally on a circular aperture of diameter 0 12cm and is viewed from the opposite side along a line through the center of the...
- Q 3 40 When a red light of wavelength 6500 A is incident on a slit in a single slit diffraction experiment and first minima for red light is at 30...
- Q In Young s double slit experiment if the intensity at the centre of screen is lo then intensity at a distance from the central maxima is here 4 B fringe...
- Q View in English d In Young s double slit experiment 10 4 d distance between slits D distance of screen from the slits at a point P on the screen...
- Q A glass slab of thickness 5 cm contains the same number of waves as 6 cm of water when both are traversed by the same monochromatic light If the refractive...
- Q Online Mock Test Series for NEET 2020 40 The first diffraction minimum due to a single slit diffraction is at 0 30 for a light of wavelength 5000 A The...
- Q 0 In YDSE let be the fringe width and be the intensity at distance from central maxima What will be the intensity of central maxima 1 21 2 41 3...
- Q A telescope can just resolve Rayleigh Criterion two objects which are 2000 km away from it If the separation between objects is 10 m and the wavelength of light used...
- Q Example In a Newton s ring experiment the diameters of nth and n 5 th dark rings are 0 114 cm and 0 142 cm respectively Find the diameters of...
- Q Online Mock Test Series for NEET 2020 1 A ray of light falls from air on a prism of refractive index 2 at an angle with the normal What should...
- Q please explain which of the following method is correct a nd why In a Fraunhofer diffraction experiment at a single slit using a light of wavelength 400nm the first minimum...
- Q Unpolarised light is incident from the air on a plane surface of a material of refractive index p At a particular angle of incidence it is four reflected and refracted...
- Q M In a Young s double slit experiment slits are separated by a distance d and screen is at distance D D d from slit plane If light source of...
- Q 4 In Young s double slit experiment the separation between the slits is halved and the distance between the slits and the screen is doubled The fringe width is a...
- Q 5 In Young s double slit experiment the y co ordinates of central maxima and 10th maxima are 2 cm and 5 cm respectively When the YDSE apparatus is immersed...
- Q 1 Fresnel s biprism having an angle of 1 and the index of refraction 1 5 form interference fringes on a screen placed 80 cm from the biprism If the...
- Q 36 In the Young s double slit experiment the intensity of light at a point on the screen where the path difference is 2 is K being the wave length...
- Q 3 Interference fringes are produced by monochromatic light falling normally on a wedge shaped film of cellophane whose refractive index is 1 4 The angle of wedge is 20 seconds...
- Q A source S and a detector D are placed at a distance d apart A big cardboard is placed at a distance 2d from the source and the detector as...
- Q Solution with explanation What is the angle of incidence for an equilateral prism of refractive index 3 so that ray is parallel to the base inside the prism 1 30...
- Q In Nehru Planetarium an astronomical telescope which has an objective lens of diameter 10 m To 7000 A What will anything through this telescope planetarium team glow a light of...
- Q Corridor figure shows an overhead view of a corridor with a plane mirror M mounted at one end A burglar B sneaks along the corridor directly toward the center of...
- Q Refractive index of diamond with respect to the glass is 1 6 and absolute refractive index of the glass is 1 5 Find the speed of the light in the...
- Q 2 14 The central fringe of the interference pattern produced by light of wavelength 6000 is found to shift to the position of fourth bright fringe after a glass plate...
- Q Multiple Choice only one answer is correct An electron is described by a wave function given by v x 2 ae x Determine the probability of finding the particle between...
- Q Answer Type 1 Two glass plates are touching at one end and separated by a thin wire at the other end When a monochromatic parallel beam of wavelength 4200 incident...
- Q 1 An isotropic point light source S of power P located a distance d specially designed non absorbing non dispersing and non refl lens This lens converges all the radiant...
- Q Q 2 The following question consists of two statements Assertion and Reason 1 A Both assertion and reason are true and the reason is the correct explanation of assertion B...
- Q A screen is placed 2m away from the 2 points lens to obtain the diffraction pattern in the focal plane of the lens in a single slit diffraction experiment What...
- Q a fluid N Displacement leads over Pressure wave by 90 degree Pressure wave and displacement are in same phase Pressure wave leads over displacement by 90 degree Pressure wave and...
- Q A linear object of length 10cm has been placed horizontally on the axis length 20cm The center of the line is at a distance 40cm from the lens What is...
- Q Find the missing order for a double slit Fraunhofer Diffraction pattern if the slit widths are 0 2 mm separated by 0 6 mm O 1st 5th 9th 2nd 6th...
- Q 29 A parallel beam of green light of wavelength 546 nm passes through a slit of width 0 40 mm the transmitted light is collected on a screen 40 cm...
- Q The intensity of a point source of light S placed at a distance d in front of a screen A is I at the center of the screen The light...
- Q Interference pattern in reflected light for normal incidence on a wedge shaped air film is seen using bichromatic 2 5896 A 5890 source of light The angle of wedge is...
- Q No work is done and kinetic energy also does not change A long narrow horizantal silt is placed 1mm above horizontal plane mirror the interference between the light coming directly...
- Q In each situation of Column 1 and incident wavefront and its corresponding reflected or refracted wavefront is shown In column II the optical instrument used for reflection or refraction is...
- Q The length of plane mirror is 1cm The wavelength of source is 5000 A The numbe of maxima formed on the large screen is n P is central point on...
- Q A wedge of mass M can slide on two parallel rails A and B inclined at an angle to the horizontal In the middle of the rails and parallel to...
- Q 7 A mixture of polarised and unpolarised light is incident on a polariser As the polariser is rotated through 360 it is found that the minimum and the maximum of...
- Q A thin film of soap solution s 1 4 lies on the top of a glass plate Hg 1 5 When visible light is incident almost normal to the plate...
- Q a 124 D 8 Fig 2 105 2y z 2D b 3d 24d C d D D 81 In YDSE if a bichromatic light having wavelengths A am A is...
- Q Paragraph for In a modified Young s double slit experiment there are three identical parallel slits S S and S A coherent monochromatic beam of wavelength 700 nm having plane...
- Q Plane wavefronts are incident on a glass slab which has refractive index as a function of distance Z according to the relation 1 Z Z This glass slab can acts...
- Q In Young s double slit experiment the 10th maximum of wavelength A is at a distance of y from the central maximum When the wavelength of the source is changed...
- Q 4 In a Young s double slit experiment the angular position 0 of a bright fringe having intensity one forth of the maximum intensity is given by YEL u a...
- Q 75 M and M are plane mirrors and kept parallel to each other At point O there will be a maxima for wavelength A Light from a monochromatic source S...
- Q Q 17 Consider a usual set up of Young s double slit experiment with slits of equal intensity moitos as shown in the figure Take O as origin and the...
- Q An object is placed in front of a spherical mirror 18 whose 2 times magnified image is formed on screen Then choose CORRECT option 1 Mirror is concave m 2...
- Q A thin equiconvex lens has focal length 10 cm and refractive index 1 5 One of its faces is now silvered and for an object placed at a distance u...
- Q 40 A Narrow cylindrical beam of light falls on a spherical air bubble located in a liquid so that the axis of the beam passes through the center of the...
- Q 5 4 the fringe width will remain unchanged In single slit pattern intensities at angul 0 are I 77 2a 37 position 0 0 57 2a and I respectively then...
- Q 3 In YDSE set up two thin transparent slabs of same refractive index having thickness t and 3t are introduced in front of slits as shown in figure As a...
- Q In the diffraction from a single slit of width 2 5 the total number of minimas and secondary maximum maxima on either side of the central maximum are A B...
- Q Two coherent light sources S and S A 6000A are 1mm apart from each other The screen is places at a distance of 25 cm from the sources The width...
- Q monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation If the refractive index of the material of the prism is 5 then...
- Q A rectangular cavity ABCD is carved inside an equilateral prism PQR of refractive index 2 shown in the figure For a ray entering at face PQ and emerging at face...
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