Physics question and answers for October 23, 2023
- Q A young double slit apparatus is immersed in liquid of refractive index 4 3 as shown in figure Slit s and s is covered with thin glass of equal width...
- Q It is found that when waves from two identical coherent sources superpose at a certain point the resultant intensity is equal to intensity of one wave only This means that...
- Q The sun makes 0 5 angle on earth surface Its image is made by convex lens of 50 cm focal length The diameter of the image will be CPMT 2003...
- Q Find the speed of light in diamond if its refractive index is 2 5 x Speed of light in vacuum 3 108 m s Ans
- Q In YDSE the distance between two coherent sources is 0 2 mm and interference pattern is observed on the screen 80 cm from the sources If the wavelength of light...
- Q Problem 24 If the path difference produced due to interference of light coming out of two slits for yellow colour of light at a point on the screen be 32...
- Q In an YDSE the fringes are formed at a distance of 1 m from double slits of separation 0 12 mm Calculate the wave length of light used its distance...
- Q 23 In the Young s arrangement screen starts moving towards right with constant speed v Initial distance between screen and plane of slits is x At t 0 1st order...
- Q The maximum number of possible interference maxima obtained on screen for slit seperation equal to twice the wavelength in Young s double slit experiment is 1 infinite 2 Five 3...
- Q The equation of progressive wave is y 0 09 sin87 t x 20 after reflection of this wave from rigid end the amplitude of reflected wave becomes 2 3 of...
- Q 3 1 18 In single slit diffraction pattern if intensity of centra maxima is then intensity of first secondar maxima is 1 4 5 of l 2 6 5 of...
- Q 34 A beam of light consisting of two wavelengths 6500 and 5200 is used to obtain interference fringes in a Young s double slit experiment a Find the distance of...
- Q Magnification A positive What of virtual image is always B negative C greater than 1 D less
- Q A wave of frequency 100 Hz travels along a string towards its fixed end When this wave travels back after reflection a node is formed at a distance of 10...
- Q 1 4 is used to cover one slit of Young s double slit experiment being performed using monochromatic beam of light of wavelength 6000 A If at the central point...
- Q A short linear object of length b lies along the axis of concave mirror of focal length f at a distance u from pole of mirror The size of image...
- Q In young s double slit experiment Assume intensity of each source is lo and K is equal to difference of maximum and minimum intensity Now intensity of one source is...
- Q 5 A poloroid sheet and an analyzer are placed such that their transmission axes are parallel The analyzer is then rotated by 22 5 What is the intensity of the...
- Q Which of the following functions represent a travelling wave a x vt b n x vt c a x d 1 x vt
- Q Example 10 4 What is the effect on the interference fringes in a Young s double slit experiment due to each of the following operations a the screen is moved...
- Q 7 In a Fresnel biprism experiment the two positions of lens give separation between the slits as 16 cm and 9 cm respectively What is the actual distance of separation...
- Q A circular disc of diameter d lies horizontally inside a metallic hemisphere bowl of radius 12 5 cm The disc is just visible to an eye looking over the edge...
- Q The mathematical forms for three sinusoidal travelling waves are given by P Wave 1 y x t 2cm sin 3x 6t Wave 2 y x t 3cm sin 4x 12t...
- Q Aakash Rank Booster Test Series for NEET 2020 In the figure shown if a parallel beam of white light is incident on the plane of the slits then the distance...
- Q A wave front AB passing through a system C as DE The system C could be emerges A D F B A a slit C a prism C E B...
- Q 4 In an isotropic medium the secondary wavelets centred on every point of a given wavefront are all a Spherical b c Oval d of arbitrary shape Cylindrical
- Q A sound of intensity 27 lo is produced at the end A It travels down to the point B along three different paths I II and III as shown in...
- Q A ray of light is incident at an angle i from denser to rare medium The reflected and the refracted rays are mutually perpendicular The angle of reflection and the...
- Q A long solenoid of diameter 0 1 m has 2 x 104 turns per meter At the centre of the solenoid a 100 turn coil of radius 0 01 m...
- Q 38 A beam of unpolarised light is incident on a tourmaline crystal C The intensity of the emergent light is I and it is incident on another tourmaline crystal C...
- Q In Young double slit experiment how many minimas can be obtained on a screen if wavelength of light used is 2000 and slit width is 0 0008 mm 1 6...
- Q 7 In Young s double slit experiment shown in figur th S1 and S2 are coherent sources and S is screen having a hole at a point 1 0mm away...
- Q 6 Light waves of intensities and 9 interfere to produce a fringe pattern on a screen The phase 3 difference between the wave at a point P is 2 and...
- Q s answer out of which only ONE OR MORE THAN ONE is are correct Two parallel beams of light P and Q separation d containing radiation of wavelength 4000 and...
- Q Two coherent sources of wavelength 6 2 x 10 7m produce interference The path difference corresponding to dark fringe between third and fourth maxima will be 6 2x 10 7...
- Q In Fraunhoffer diffraction pattern angular widt of central maximum is a sin c sin 2 d d b 2 sin d sin 4 2 2d
- Q Two speakers are placed as shown in Fig S 1 A B X HS D Mark out the correct statement s 1 If a person is moving along AB he...
- Q Two metal spheres have radii r and 2r and they emit thermal radiation with maximum intensities at wavelengths and 22 respectively The respective ratio of the radiant energy emitted by...
- Q 4 96 In Fraunhoffer diffraction the centre of diffraction image is Vi 1 always bright 2 always dark 3 sometimes bright and sometimes dark 102 4 bright for large wavelength...
- Q A lens is made of flint glass refractive index 1 5 When the lens is immersed in a liquid of refractive index 1 25 the focal length 1 Increases to...
- Q 1 A fish in water refractive index n looks at a bird vertically above in the air If y is the height of the bird and x is the depth...
- Q A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometre from two objects The minimum distance between these two objects which...
- Q 5 Two polaroids are crossed If now one of them is rotated through 30 and unpolarised light of intensity lo is incident on the first polaroid then the intensity of...
- Q Due to effect of interfernce floating oil layer in water is visible coloured due to observation of this event the thickness of oil layer should be 1 10 nm 4...
- Q 7500 and X In Young s double slit experiment the slits are 2mm apart and are illuminated with a mixture of two wavelength 9000 A At what minimum distance from...
- Q In an interference pattern at a point we observe the 16th order bright fringe or maxima for 7200 What order will be visible here if the source is replaced by...
- Q If intensity of principal maximum in Fraunhof single slit diffraction is Then intensity second order secondary maxima is 1 2 3 lo 62 5 ol lo 22 5 4
- Q Bichromatic light of wavelength 2 3000 and 5000 is used in YDSE It is found the n bright fringe of overlap with n Bright fringe of 22 If D 1...
- Q The wavelength of a distant star is 5700 and the spectral light has a shift 1 9 towards red end then the velocity of star relative to earth will be...
- Q A convex lens of power P is immersed in water how will its power change 2 1 1 Increases 2 Decreases 3 Remains unchanged Tinig 4 Increases for red colour...
- Q Light of wavelength is incident on a slit of width d The resulting diffraction pattern is observed on a screen at a distance D The linear width of the principal...
- Q nm 1 Two coherent monochromatic point sources S and S of wavelength placed symmetrically on either side of the center of the circle as shown The sources are separated by...
- Q The speed of light in an isotropic medium depends on 1 the direction of propagation 2 the wavelength 3 its intensity
- Q 104 In Young s double slit experiment D d distance between the slit D distance of screen from slits At a point P on the screen the resulting intensity is...
- Q Two beams of light having intensities I and 41 interfere to produce a fringe pattern on a screen The phase T difference between the beams is 2 PEEDHOD at a...
- Q 1n Young s double slit experiment the intensity of light at a point on the screen where the path difference is K being the wavelength of light used The intensity...
- Q c 61 d Two coherent sources P and Q produce interference at point A on the screen where there is a dark band which is formed between 4th bright band...
- Q The sound emitted from the siren of an ambulance has frequency of 1500 Hz The speed of sound is 340 m s Calculate the difference in frequencies heard by a...
- Q In order that a thin film of oil floating on surface of water should show colours due interference the thickness of the oil film sho be of the order of...
- Q A beam of natural light falls on a system of 5 polaroid s which are arranged in succession such that the pass axis of each polaroid is turned through 60...
- Q A plane mirror and a concave mirror of radius o curvature 60 cm are placed facing each other with a point object at the center of them If the image...
- Q A double slit of separation 1 5 mm is illuminated by white light between 4000 8000 On a screen 120 cm away coloured interference pattern is formed If a pinhole...
- Q In Young s double slit experiment to increase the fringe width 1 the wavelength of the source is increased 2 the screen is moved towards the slits 3 the source...
- Q In Young s double slit experiment using a monochromatic light of wavelength the path difference in terms of an integer n corresponding to any point having half the peak intensity...
- Q Transverse nature of light was confirmed by the phenomenon of 1 refraction of light 3 dispersion of light 2 diffraction of light 4 polarisation of light
- Q JEL 43 A source of light of wavelength 5000A is placed at one end of a table of 200 cm long and 5 mm above its reflecting surface Find the...
- Q 2 wa intensity ratio of the sources 4 distance between the sources When viewed in white light soap bubble shows colours because of 2 Scattering 3 Diffraction 4 Dispersion light...
- Q 3 In an interference experiment monochromatic light is replaced by white light we will see 1 Uniform illumination on the screen 2 Uniform darkness on the screen 3 Equally spaced...
- Q 13 For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 500 nm 1 32 m 3 16 m 2...
- Q In a double slit experiment the two slits are 1 mn apart and the screen is placed 1 m away A monochromatic light of wavelength 500 nm i used What...
- Q by the thin convex lens is where length of convex lens is 10 cm and it is placed along y axis 1 10 10 cm 45 YA 2 10 20...
- Q 1 Light of wavelength 589 3 nm is incident normally on a slit of width 0 01 mm The angular width of the central diffraction maximum at a distance of...
- Q A lens having focal length f and aperture of diameter d forms an image of intensity I Aperture d of diameter in central region of lens is covered 2 by...
- Q Interference pattern is observed at P due to superimposition of two rays coming out from a source S as shown in the figure The value of for which maxima is...
- Q In diffraction using single slit a slit of width a is illuminated by white light For red light 6500 A the first minima is obtained for 0 30 Then the...
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