Physics question and answers for October 26, 2023
- Q 2 The intensity of the polarized light becomes 1 th of its initial value after passing through the 20 analyser Angle between the transmission axis of the analyser and the...
- Q A telescope has an objective lens of 20 cm diameter and is situated at a distance of 2 km from two objects The minimum distance between the two objects which...
- Q 38 A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence He can get a...
- Q Refrerring to the figure the image of the quadrilateral XYZW placed front of the concave mirror M 15cm B C F C W X 3cm will be congruent of itself...
- Q A double slit experiment is performed with a slit separation of 1 mm It is found that the central diffraction maximum contains exactly 13 bright interference fringes The first diffraction...
- Q Waves originating from three coherent monochromatic sources reach a point O with identical polarization amplitude and phase The resultant intensity at that point is 1 The second source suddenly develops...
- Q A beam of light with a plane wavefront needs to be transformed into one with a convergent spherical wavefront For this purpose which of the following may be suitable A...
- Q A point source S is placed at a distance of 15 cm from a converging lens of focal length 10 cm on its principal axis Where should a diverging mirror...
- Q Phy Section B This section contains 15 SINGLE CORRECT TYP questions Out of these 15 questions candidate Read More ntensity at the centre of the screen in YDSE is 8...
- Q A compound microscope is designed to resolve objects which are 0 01 mm apart If the focal length of the objective is 4 cm and the wavelength of the light...
- Q In a double slit experiment the slit separation is 0 16 mm and the width of each slit is 0 02 mm The slits are illuminated with light of certain...
- Q Two thin plano convex lenses each of focal length m in air are placed at some distance d from each other as shown in the figure The space between the...
- Q 30 A transparent rectangular slab of length 1 20 cm and thickness d cm is placed in front of a converging lens of focal length f 20 cm screen S...
- Q In Young s double slit experiment a glass plate is placed before a slit which absorbs half the intensity of light Under this case a The brightness of fringes decreases...
- Q 129 In given diagram calculate value of x for which intensity at point P is equal to intensity at point O S and S are coherent sources AD S 22...
- Q 0 Monochromatic light of wavelength 620 nm passes through a very narrow slit S and then strikes a screen in which are two parallel slits S and S as in...
- Q Interference fringes are produced using Lloyd s mirror and a 606 nm source as shown in Figure 37 15 Fringes 1 20 mm apart are formed on a screen 2...
- Q 3 sin 2 4 2 sin 2 White light is incident normally on a glass plate placed in air If the thickness of glass plate is 5000 and its refractive...
- Q DOPPLER S EFFECT sees traffic jam A speeding motorcyclist ahead him He slows down to 36 km hour He finds that traffic has eased and a car moving ahead of...
- Q A diffraction grating with 10 lines m is used to determine the wavelength of source The angle of first order diffraction is 30 The wavelength of th monochromatic source is...
- Q ANGLE OF DEVIATION REFRACTIVE INDEX A thin prism of angle 15 made of glass of refractive index 1 5 is combined with another prism of glass of refractive index u...
- Q sing the expression 2d sin 0 2 one calculates the values of d by measuring the corresponding angles 0 in the range to 90 The wavelength is exactly known and...
- Q In Michelson interferometer arrangement if one of the mirrors is moved by a distance 0 08 mm if the wavelength of the incident light is 6400 find the number of...
- Q Q14 When a thin plate of refractive index 1 5 is placed in the path of one of interfering beams of Michelson Interferometer a shift of 30 fringes is observed...
- Q The refractive index of a medium is 3 If the unpolarised light is incident on it from air at the polarizing angle of the medium the angle of refraction is...
- Q Two broad monochromatic beams A and B of plane coherent waves of the same intensity and wavelength propagating at angle 0 from each other Simultaneously illuminate a cylindrical screen Direction...
- Q 81 plane polarised and unpolarised light falls normally on a polarising sheet On rotating the polarising sheet about the direction of the incident beam the transmitted intensity varies by a...
- Q An arrangement for YDSE is shown in figure S is a light source then find the position of central maxima from point O on screen B f 20 cm S...
- Q The slits in Young s double slit experiment are illuminated by light of wavelength 6000 A If the path difference at the central bright fringe is zero then the path...
- Q 7 A beam of light of 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen...
- Q 2 The intensity at the maximum in a Young s double is lo Distance between two slits is is the wavelength of light used in the experiment What will be...
- Q Angular width of the central maxima in the Fraunhofer diffraction for 6000 is 0 When the same slit is illuminated by another monochromatic light the angular width decreases by 30...
- Q Q46 In Young s double slit experiment the source is red light of wavelength 7 x 10 7 m When a thin glass plate of refractive index 1 5 at...
- Q Q40 A point source Semitting light of wavelength 600 nm is placed at a very small height h above a flat reflecting surface AB see figure The intensity of the...
- Q Two source s1 s2 are separate by distance 4 2lemda if an observer stand in middle of t he two observer start moving towards s2 F und distance travelled by...
- Q In the figure shown S and S are effective point sources of radiation excited by the same oscillator They are coherent and in phase with each other Placed 4 0...
- Q Consider the standard Young s double slit experiment setup Let Ax represent the path difference between the waves reaching P Mark the incorrect statement d 2 S d 2 S...
- Q Two coherent light sources radiate in phase The distance between sources is d where d 4 is the wavelength of incident light Figure The angles are measured from the line...
- Q In a single slit diffraction the first minimum is at angle 30 when light of wavelength 600 nm is used The angular position of first secondary maximum will be 1...
- Q 1 5 is location of bright fringe l e there are 8 bright fringes and 7 minimal pls confirm the answer A bright fringe in Young s double slit experiment...
- Q White light is incident normally on a glass plate placed in air If the thickness of glass plate is 5000 A and its refractive index is 3 2 then among...
- Q There are two plane mirrors They are mutually inclined S is a source emitting light of wavelength The reflected beams interfere and fringe pattern is obtained on the screen If...
- Q In YDSE arrangement shown in figure fringes are seen on screen using monochromatic source Shaving wavelength 3000A in air S and S are two slits separated by d 1mm from...
- Q 1 90 2 89 3 67 4 81 In a young s double slit experimental arrangement shown here if a mica sheet of thickness t and refractive index u is...
- Q Objective NCERT Phys 7 Unpolarised light of intensity 32 W m passes through three polarisers such that transmission an of first is crossed with third If intensity of emerge light...
- Q E 2 85 The angle between pass axis of polarizer and analyser is 45 The percentage of polarized light passing through analyser is a 75 b 25 c 50 d...
- Q in water incidence is c 53 74 97 When the angle of incidence is 60 on the surface of a glass slab it is found that the reflected ray is...
- Q slit 27 When the diffraction pattern from a certain illuminated with laser 2 6330 is projected on a screen 150 cm from the slit the second minima on each side...
- Q 7 3 5 2nd 2D 33 In Young s double slit experiment the 10 maximum of wavelength A is at a distance y from its cented maximum and the 5th...
- Q Two In coherent point sources of light SA SB of same power are placed at the level of the slits and S as shown Take D d An interference pattern...
- Q If the first minima in a young s slit experiment occurs directly in front of one of the slits then the wavelength of the radiation used is assume d D...
- Q 26 A Qubit can be Implemented by Select all that apply a photoionization of photon b polarization of photon c the energy level of the neutron d the Energy level...
- Q 39 180 In Young s double slit experiment intensity on the is What will b screen where path difference is 6 intensity at the point where path difference is 1...
- Q A parallel beam of light of wavelength 600 nm is incident normally on a slit of width d If the distance between the slits and the screen is 0 8...
- Q iv In a Young s double slit experiment the slit separation is doubled To maintain the same fringe spacing on the screen the screen to slit distance D must be...
- Q A thin layer of colorless oil is spread over water in a container u 1 4 If the light of wavelength 640 nm is absent in the reflected light what...
- Q 2 2 27 34 A narrow slit of width 2 mm is illuminated by monochromatic light of wavelength 500 nm The distance between the first minima on either side on...
- Q using the 23 In Young s double slit experiment monochromatic light of wavelengths intensity of light at a point on the screen with path difference is M units The intensity...
- Q c 2 and 3 only d 1 and 3 only 2 In Young s double slit experiment two disturbances arriving at a point P have phase difference of The intensity...
- Q Two polaroids are oriented with their planes perpendicular to incident light and transmission axis making an angle of 37 with each other The percentage of incident unpolarise light transmitted through...
- Q 45 Match the corresponding entries of column 1 with column 2 Where m is the magnification produced by the mirror 2016 Column 1 A m 2 B C m m...
- Q In the far field diffraction pattern of a single slit under polychromatic illumination the first minimum with the wavelength A is found to be coincide with the third maximum So...
- Q In Fraunhofer diffraction by a single slit a position where first order minima is formed by wavelength of 750 nm first order maxima is forme by unknown wavelength The unknown...
- Q Initially interference is observed by YDSE with entire experimental set up inside a chamber filled with air Now chamber is evacuated With same source of light used a careful observer...
- Q A concave mirror of small aperture and focal length of 8 cm lies on table and an object is kept vertical above it If concave mirror is filled with water...
- Q 4 In Young s double slit experiment the distance between slits and screen is 2 m and distance between slits is 0 25 mm A light of wavelength 800 nm...
- Q The aperture of the largest telescope in the world is 5 m if the separation between the moon and the earth is 4 x 105 km and the wavelength of...
- Q point Two coherent radio frequency sources separated by 2 0 m are radiating in phase with 1 0m A detector move in a circular path of large radius around the...
- Q Consider an YDSE that has different slits width as a result amplitudes of waves from two slits are A and 2A respectively If lo be the maximum intensity of the...
- Q herent sources are placed at a distance 32 from each other symmetric to the centre of the circle shown in the figure then number of maxima shown on the screen...
- Q 4 A plane electromagnetic wave travels in vacuum along z direction If the frequency of the wave is 40 MHz then its wavelength is a 5m b 7 5 m...
- Q A monochormatic plane wave of speed c and wavelength is diffracted at a small aperture The diagram illustrates successive wavefronts After what time will some portion of the wavefront XY...
- Q A point source S of light is fixed on a vertical wall and plane mirror starts moving with a velocity v towards the wall The adjoining figure shows the top...
- Q The beams A and B of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid From the position when the beam A has maximum intensity...
- Q c 1 67 13 A monochromatic beam of light falls on apparatus at some angle say 0 as shown in figure A thin sheet of glass is inserted in front...
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