Physics question and answers for October 25, 2023
- Q Light containing two wavelengths 1 and 22 falls normally on a planoconvex lens of radius of curvature R resting on a glass plate If the nth dark ring due to...
- Q In Young s double slit experiment a thin transparent sheet of thickness t and refractive index is introduced in the path of one of the interfering beams This shifts the...
- Q ir at a ooking 4 1 75 D uld the beyond 6 The following diagram shows a glass sphere of radius 10 em with a paraxial incident ray The refractive...
- Q In a YDSE a parallel beam of light of wavelength 6000A is incident on slits at angle of incidence 30 A and B are two thin transparent films each of...
- Q For a transparent and permittivity medium relative permeability fr Mr and E are 1 0 and 1 44 The velocity of light in this medium respectively would be A 4...
- Q Width of face of a person is 18 cm He is looking at his face if separation between the eyes is 8 cm What is the minimum width of mirror...
- Q A trihedral prism with refracting angle 60 deviates a light ray by 30 The refractive index of the material of prism Question Type Multiple Correct Type 1 may be equal...
- Q Two ideal slits S and S are at a distance d apart and illuminated by light of wavelength passing through an ideal source slit S placed on the line through...
- Q In a double slit experiment a monochromatic light of wavelength 500 nm is used The fringe pattern is observed on a screen 1m away on a screen Fringe width is...
- Q Question 24 1a A pair of slits separated by 1 75 x 10 4 m is illuminated by 594 nm light and an interference pattern is observed on a screen...
- Q Q 13 O Moderate A leaf which contains only green pigments is illuminated by a laser light of wavelength 0 632 m It would appear to be Brown Black Red...
- Q What is the approximate radius of the central bright diffraction spot of light of wavelength 0 5 m if focal length of the lens is 20cm and radius of aperture...
- Q maximum et rays are 26 The average energy density of electromagnetic wav given by E 50 N C sin wt ke will be nearly 1 10 8 J m 2...
- Q The focal lengths of a lens for violet green and red light rays are fy fg and fa respectively Which of t relationship A fR fG fy fy fG fR...
- Q In a Fraunhofer diffraction experiment at a single slit using a light of wavelength 400 nm the first minimum is formed at an angle of 30 The direction of the...
- Q Two slits S and S lie on the x axis and symmetric with respect to y axis are illuminated by a parallel monochromatic light beam of wavelength I as shown...
- Q an incident plane wavefront makes angle 53 with surface of medium in air The refracted wavefront makes angle 37 w cefractive index of medium is A B U 3 2...
- Q In the Young s double slit experiment a mica slip of thickness t and refractive index is introduced in the ray from first H sources By how much distance fringes...
- Q Q 1 4 1 00 21 A beam of ordinary unpolarised light passes through a tourmaline crystal C and then it passes through another tourmaline crystal C which is oriented...
- Q 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 away...
- Q In the Young s double slit experiment the ratio of intensities of bright and dark fringes is 9 This means that 1 The intensities of individual sources are 5 and...
- Q Q 7 Moderate 4 1 00 16 The extreme wavelengths of Paschen series are 0 365 m and 0 565 m
- Q Q7 Unpolarized light with an intensity of I is incident on a polarizer The polarizer has its transmission axis aligned at 60 intensity of the light when it emerges from...
- Q In YDSE a laser light is used to illuminate the closely spaced slits as a result a clear interference pattern is obtained on screen If we place smoke particles between...
- Q 3 An object shaped as L is placed between two parallel plane mirrors as shown In the first seven closest images how many laterally inverted images are formed 1 1...
- Q In a Young s double slit experiment with slit separation 0 1 mm one observes a bright 1 40 fringe at angle rad by using light of wavelength X When...
- Q Two sources give interterence pattern which is observed on a screen placed at a distance D from the sources The fringe width is given as 2W If the distance of...
- Q 1 An equi convex lens of focal length 10 cm at t 0 and refractive index u 1 5 is placed in a liquid whose refractive index varies with time...
- Q 28 In the figure shown three slits S1 S2 and s3 are illuminated with light of wavelength 2 d and D d Each slit produced same intensity I on the...
- Q 33 60 Mirror 2 1309 1 60 3 0 TI Mirror 1 A ray of light is incident on the surface of mirror I as shown in the figure then...
- Q In Newton s ring experiment the diameter of the nth dark ring is 8 mm and that of the n 5 th dark ring is 12 mm If the radius...
- Q Example 9 6 Light from a point source in air falls on a spherical glass surface n 1 5 and radius of curvature 20 cm The distance of the light...
- Q a 55 A container made of glass 1 5 contains liquid A ray of light passing through the liquid falls on the bottom of the container at an angle of...
- Q Coherent light rays of wavelength A strike a pair of slits separated by distance d at an angle 0 as shown in Figure P37 14 Assume an interference maximum is...
- Q In YDSE the central bright fringe is at mid point of screen On both side of mid point fringes are obtained Number of fringes on either side is n with...
- Q Find the position coordinates of the image of the object P as seen through the periscope The mirrors are inclined at 45 with x axis and eye is placed at...
- Q In a YDSE fringes are observed by using light of 4800 if a glass plate p 1 5 is wavelength introduced in the path of first wave and of same...
- Q In Young s double slit experiment when wavelength used is 6000 A and the screen is 40 cm from the slits the fringes are 0 012 cm apart What is...
- Q 36 Choose the correct alternative 1 When plane polarised light passes through polaroid it changes its nature to linearly polarised 2 Refracted light when light is incident at Brewster angle...
- Q In a Young s double slit experiment the intensity at the central maximum is lo The intensity at a distance 3 4 from the central maximum is B is fringe...
- Q Quest sed on the following write up If Snell s law is found valid for two mediums whose refractive indices have opposite signs the incident and the refracted rays must...
- Q 5 A single slit is of width 0 5 mm Distance of screen from slit is 1 m Second maxima in diffraction pattern is at distance 2 mm from centre...
- Q In young s double slit experiment fringe width is found to be 0 4 mm If the whole apparatus is immersed in water of refractive Index 4 3 without disturbing...
- Q In YDSE distance of screen is 2m The fringe width is 1 mm light of wavelength 600 nm is used If a thin plate of glass u 1 5 of...
- Q In a Young s double slit experiment the slit separation is 0 4 mm and the distance between the screen and the slit is 120 cm If the 3rd dark...
- Q Q4 The frequency of a light ray is 6 1014 Hz Its frequency when it propagates in a medium of refractive index 1 5 will be a 1 67 x...
- Q In a double slit experiment the two slits are 1 mm apart and the screen is placed 1 m away A monochromatic light of wavelength 500 nm is used What...
- Q Question 5 A parallel beam of light strikes a piece of transparent glass having cross section as shown in the figure below Correct shape of the emergent wavefront will be...
- Q In the Young s double silt experiment the intensity of light at a point on the screen where the path difference is is K being the wave length of light...
- Q Find out the minimum distance of a point on the screen such that the intensity at the point is equal the intensity of one of the slit
- Q A parallel beam of light of wavelength is incident normally on a narrow slit A diffraction pattern formed on a screen placed perpendicular to the direction of the incident beam...
- Q A concave mirror of radius 40 cm lies on a horizontal table and water is filled in it up to a height of 5 00 cm A small dust particle...
- Q 7 A telescope has an objective of focal length 50 cm and eyepiece of focal length 5 cm The least distance of distinct vision is 25 cm The telescope is...
- Q A transverse wave described by equation y 0 02sin x 30t where x and t are in meters and seconds respectively is travelling along a wire of area of cross...
- Q In three to five sentences explain why two slightly separated coherent sources of circular waves result in an alternating pattern of bright and dark bands on a screen held some...
- Q Above figure shows a beam expander made with two co axial converging lenses of focal length f and f and separation d f f Parallel light rays incident on lens...
- Q 10 A practically very small source S of light is kept in front of a plane mirror But due to imperfect manufacturing there is a small spherical bulge radius of...
- Q 4 Light of wavelength 6000 A falls normally on a thin wedge shaped film of refractive index 1 35 forming fringes which are 2 mm a part Find the angle...
- Q A ray of light travels through air and strikes the surface of a liquid at an angle of 38 then refracts in the liquid at an angle of 24 2...
- Q If the wavelength of a wave in a medium is doubled increased by a factor of 2 wha will happen to the frequency a The frequency will also increase by...
- Q The wavelength of sound emerging from a moving source is observed to decrease from its stat value in a certain direction from the source Then the source A must be...
- Q If a thin mica sheet of thickness t and refrective index u 5 3 is placed in the path of one of the interfering bean as shown in fig Then...
- Q Q 4 A monochromatic light of wavelength is incident normally on a narrow slit of width a to produce a diffraction pattern on the screen placed at a distance D...
- Q Two coherent sources are separated by a distance d 2X are placed at the centre of a large circular screen arranged symmetrically as shown R is radius of circular screen...
- Q Anna looks at white light through a slit in a spectroscope and sees a rainbow of colors Which of these is the best explanation for why she sees many colors...
- Q 2 What is the critical angle for the light rays hitting cornea from the inside of the eye for them not being able to leave the eye assume the medium...
- Q 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 screen...
- Q let be the In a Young s double slit experiment fringe width and let I be the intensity at the central bright fringe At a distance x from the central...
- Q Two identical loudspeakers are placed on a line at distance 4 m and 6m from a microphone lying on the line joining them The output of each speaker at the...
- Q 9 The first diffraction minimum due to a single slit diffraction is at angle 0 30 for a light of wavelenth 5000A The width of the slit is 1 5...
- Q Figure shows the displacement time graph of a particle executing SHM with a time period T Four points 1 2 3 and 4 are marked on the graph where the...
- Q Red light 1 600 nm falls on a single slit an forms a diffraction pattern on a white marke board 1 50 meters away If the second dark band is...
- Q The radius of the objective lens of a telescope is 5 cm and wavelength of light is 5000A The telescope is situated at a distance of 1 km from two...
- Q 1 A transverse wave is travelling along a horizontal string The first picture shows the shape of the string at an instant of time This picture is superimposed on a...
- Q As shown mono energetic x rays with a wavelength of 0 35 nm are diffracted by a crystal The angle relative to normal incidence to the crystal is 8 0...
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