Physics question and answers for October 24, 2023
- Q 5 Two coherent sources emit light beams of intensities 91 and 161 respectively If intensity of second source is made same as first ratio of fringe visibilities will be A...
- Q Sir i did not understand this ques pl z explain step by step how do we de al with such types of questions An arrangement for YDSE is shown in...
- Q 6 Light of wavelength 600 nm is incident on an aperture of size 2mm What will be the distance upto which the ray of light can travel such that its...
- Q a a d 4 13 In a YDSE experiment if a slab whose refractive index can be varied is placed in front of one of the slits Assume slits of...
- Q 12 In the figure shown if a parallel beam of white light is incident on the plane of the slits then the distance of the nearest white spot on the...
- Q 15 A single slit of width 0 20 mm is illuminated with light of wavelength 500nm The observing screen is placed 80cm from the slit The width of the central...
- Q 8 Two identical coherent sources placed on a diameter of a circle of radius R at separation x R symmetrically about the centre of the circle The sources emit identical...
- Q c Both of these d None of these 42 A parallel beam of monochromatic light of wavelength 5000A is incident normally on a single narrow slit of width 0 001mm...
- Q a 3 0 b lo c 5 0 d 9 0 11 Two coherent light sources each of wavelength are separated by a distance 3 The maximum number of 32...
- Q 65 The graph showing the dependence of intensity of light on the angle between polariser and transmitted analyser is To 45 90 135 180 0 H 45 90 135 180...
- Q If a transparent parallel plate of uniform thickness t and refractive index u is interposed perpendicularly in the path of a light beam the optical path is a increased by...
- Q transparent film of micaand glass are put in the path of two waves If their thickness are 3t and 2t respectively What should be refractive index of mica so that...
- Q 13 In a Fraunhofer diffraction at a single slit of width d with incident light of wavelength 5500 the first minima is observed at an angle 30 The first secondary...
- Q A beam of light consisting of two wavelengths 560 nm and 420 nm is used to obtain interference fringes in a Young s double slit experiment Find the least distance...
- Q A Young s double slit set up for interference is shifted from air to within water then the fringe width a Becomes infinite b Decreases c Increases d Remain unchanged...
- Q 15 Two coherent sources S and S are separated by 1 5 A Interference fringes are observed on circular screen as shown The total number of minima observed is S...
- Q 25 Two slits S and S illuminated by a white light source give a white central maxima A transparent sheet of refractive index 1 25 and thickness t is placed...
- Q 22 In a Young s interference experimental arrangement incident yellow light is composed of two wavelength 5890 and 5895 Distance between the slits is 1 mm and the screen is...
- Q A converging lens of focal length 15 cm is placed coaxially in front of a concave mirror of focal length 37 5 cm at a distance of 15 cm from...
- Q 25 A plane wavefront 2 6 x 10 7m falls On a slit 0 4 mm wide A convex lens of focal ength 0 8m placed behind the slit focusses...
- Q 1 In case of interference the energy is redistributed 2 In case of interference the sources emit waves of nearly same frequency 3 The production of beats is the result...
- Q 2 Assertion Though light of a single frequency monochromatic is incident on a metal the energies of emitted photoelectrons are different Reason The energy of electrons emitted from inside the...
- Q In the figure shown all pulleys are light and there is no friction between pulley and strings Masses m m 2kg and all strings have a linear mass density 3...
- Q Problem 8 Laser light of wavelength 630 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 8 1 mm A...
- Q Problem 6 The minimum deviation produced by a glass prism of angle 60 is 30 If the velocity of light in vacuum is 3 x 1010 cm sec calculate the...
- Q The Brewster angle for the glass air interface is 54 74 If a ray of light going from air to glass strikes at an angle of incidence 45 then the...
- Q In a YDSE setup we plot the phase difference between both waves at point P on the screen against the angular position e of point P on the screen The...
- Q A beam of monochromatic green light is diffracted by a slit of width 0 550mm The diffraction pattern forms on a wall 2 06m beyond the slit The distance between...
- Q A special kind of light bulb emits monochromatic light of wavelength 700 nm Electrical energy supply to it at the rate of 60 W and the bulb is 50 efficient...
- Q ht of 2 different wavelengths 632nm and 474 nm passes through a single slit of width 7 15 10 5 m The two diffraction patterns are observed on a screen...
- Q The light waves having having wave wave equations y 10Sin wt kx and y 5Sin kx wt o interfere The ratio of maximum to the minimum intensity of light in...
- Q 8 In a Newton s ring experiment setup the diameter of the third ring has been found to be 0 2 cm and th of the twentieth ring 0 7...
- Q In young s double slit experiment relative intensity at a point on the screen may be defined as ratio of intensity at that point to the maximum intensity on the...
- Q Light with average flux of 50 W cm2 falls normally on non reflecting surface at normal incident having surface area 10 cm2 The energy received by the surface during time...
- Q 10 1 Consider a light beam incident from air to a glass slab at Brewster s angle as shown in the figure P A polaroid is placed in the path...
- Q For the following questions assume the wavelengths of visible light range from 380 nm to 760 nm in a vacuum a What is the smallest separation in nm between two...
- Q What do you understand by interference of light Two waves with amplitudes al and 92 and angular frequency o are imposed Find the intensity in case of constructive interference and...
- Q iii In Newton s rings experiment the diameter of 5th dark ring is reduced to half of its value after placing a liquid between plane glass plate and convex surface...
- Q A glass rod of refractive index 1 5 has ends as shown in figure below The object O is at a distance 2R from the surface of larger radius of...
- Q In the young s double slit experiment the intensity at the central maxima is observed to be lo If one of the slits is covered then intensity at the central...
- Q 8 A Newton s ring arrangement is used with a source emitting two wavelengths 21 6000 A and 22 5000 A and it is found that nth dark ring due...
- Q Example 26 An unpolarized light is successively passed through two polaroids each with their transmission axis parallel If the intensity of unpolarized light be lo then intensity of the light...
- Q A parallel beam of monochromatic light falls normally on a narrow slit of width a to produce a diffraction pattern on the screen placed parallel to the plane of the...
- Q length 15 cm is cut into two equal halves as shown in Fig 9 72 What is the focal length of each half CBSE Sample Paper 98 Solution For the...
- Q A thin convex lens L refractive index 1 5 is placed on a plane mirror M When a pin is placed at A such that OA 18 cm its real...
- Q is a 28 In a Young s double slit experiment using mono chromatic light the fringe pattern shifts b nig by a certain distance on the screen when a mica...
- Q If one of the slits of a standard YDSE apparatus is covered by a thin glass slab so that it allows only half of the light intensity of the other...
- Q In young s experiment the upper slit is covered by a thin glass plate of refractive index and of thickness 97 where is the wavelength of light used in the...
- Q In a YDSE experiment if a slab whose refractive index can be varied is placed in front of one of the slits then the variation of resultant intensity at mid...
- Q 7 A point object O is placed in front of a concave mirror of focal length 10 cm A glass slab of refractive index u 3 2 and thickness 6...
- Q intensity 10 2 B Io 2 D 2 Io C L 2 Light of wavelength 6000 x 100 metre is incident on a slit The first minimum of the diffraction...
- Q 6 Match the corresponding entries of column 1 with column 2 Where m is the magnification produced by the mirror Column 1 Column 2 A m 2 p Convex mirror...
- Q As shown in the figure a glass prism of refractive index 4 3 is immersed in a liquid of refractive index 5 4 The beam of light incident normally on...
- Q away from the slits S and S2 In each of these cases S Po S2Po S1P1 S2P1 N 4 and S1P2 S2P2 N3 Column I shows four situations of standard...
- Q In Young s double slit experiment the intensity at a point P on the screen is half the maximum intensity in the interference pattern If the wavelength of light used...
- Q A B C D A plane mirror which rotates 10 times per minute reflects light on to a stationary mirror 50 m away This mirror reflects the light normally so...
- Q In Young s double slit experiment white light is used The separation between the slits is kept 1 mm and intensity is observed on screen distance 2m from the plane...
- Q Interpret Young s Double slit experiment Two straight and narrow parallel slits 3mm apart are illuminated by a monochromatic ligh of wavelength 5900 A Fringes are obtained on a screen...
- Q TU YDSE the phase difference between two coherent sources is and constant The intensity at a point whic 3 at equal distance from the sources is 1 is maximum intensity
- Q d Cylindrical mirror he focal length of a concave mirror is f and the distance from the object to the principle focus is x The ratio of the size of...
- Q A point source S is placed at the bottom of different layers as shown in the figure The refractive index of bottom most layer is uo The refractive index of...
- Q 66 A particle is dropped from a height H The de Broglie wavelength of the particle as a function of height is proportional to NCERT Exemplar b H 2 d...
- Q Sodium light of wavelengths 589 nm and 589 6 nm are made incident normally on a grating having 500 lines mm Calculate the angular dispersion of these lines in the...
- Q 3 Plane waves from a magnesium lamp 2 518 36 nm arrive perpendicularly on an opaque screen containing a long 0 250 mm wide slit A large nearby positive lens...
- Q The Solar Constant 2 calories per square centimeter per minute is the annual amount of solar energy available at the top of the earth s atmosphere O the solar power...
- Q S Answer S A The wavelength of the light emitted by the sources is A The distance between adjacent sources is d 3A The distance of S from the screen...
- Q In a standard YDSE setup if the screen is kept tilted as shown find the distance OA if first maximum is formed at A Wavelength of light emitted by source...
- Q 9 Which of the following functions for y can never represent a travelling wave a x vt b log c e d x vt Xo A x vt xo 1...
- Q the value of k if FSHM FHM 0 9 for y 0 1 m How are Newton s Rings formed Find the wavelength of light if the diameters of 8th...
- Q In Young s double slit experiment 12 fringes are observed to be formed ina certain segment of the screen when light of wave length 600 nm is used If the...
- Q Two identical thin plano convex glass refractive index 1 5 each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre The...
- Q Among the two interfering monochromatic sources A and B A is ahead of B in phase the observation be taken from point P such that PB PA 2 4 Then...
- Q Assuming that light of wavelength 550 nm is coming from a star The limit of resolution of a telescope whose objective lens has diameter of 1 22 m is O...
- Q a young s double slit experiment the slits are illuminated by monochromatic light The entire set up is immersed in pure water In order to restore the original fringe width...
- Q In a Young s double slit experiment slits are separated by 0 5 mm and the screen is placed 150 cm away A beam of light consisting of two wavelengths...
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