Physics question and answers for November 13, 2023
- Q A ray of light enters into a thick glass slab from air as shown in figure The refractive index varies as 2 3 y If width of slab is very...
- Q Plane polarised light is passed through a 6 polaroid On viewing through the polariod we find that when the polariod is given one complete rotation about the direction of the...
- Q 20 A converging lens and a diverging lens share the same principal axis Their focal lengths are f f respectively What should be the distance between them so that a...
- Q 2 The reason of seeing the Sun a little before the sunrise is MP PMT 2001 Odisha JEE 2003 b Refraction of the light d Dispersion of the light a...
- Q A thin glass slab of thickness t and refractive index H is inserted between an object O and an observer both of which are in a medium of refractive index...
- Q Light of wavelength 6000 falls on a plane reflecting surface in vacuum Frequency and wavelength of the reflected light will be O 6000 6 1014 Hz 6000 5 10 4...
- Q In the expression for resolving limit of a 1 22 2 sin microscope d called min the product usin is also Objective aperture O Fresnel distance
- Q Assume that light of wavelength 7500 is coming from a star What is the limit of resolution of a telescope whose objective has a diameter of 150 inch 1 inch...
- Q 20 68 7 m For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 450 nm 42 7 m Mark...
- Q Who gave the corpuscular model of light and derived Snell s law O Newton Descartes min se Huygens
- Q Plane glass slab is kept between a model and a plane mirror The mirror is 50 cm away from the model The glass slab has a thickness of 15 cm...
- Q Parallel rays of light are focused by a thin convex lens A thin concave lens of same focal length is then joined to the convex lens and the result is...
- Q 6 There is a medium has refractive index and 3 3 another medium 2 has refractive index 2 refractive index of medium 2 with respect to medium 1 will be...
- Q A ray of light is incident at an angle of 60 on one face of a prism of angle 30 The emergent ray of light makes an angle of 30...
- Q If oil film of uniform thickness t is formed on water Refractive index of oil is more than water A Monochromatic light of wavelength is incident normally on the oil...
- Q The forward base safe operating area pertains to O The transistor operation when base collector junction is forward biased to turn on the transistor The transistor operation when base emitter...
- Q A point object O can undergo freefall motion along vertical line AB as shown in igure The mirror is vertical plane mirror When image of the object is first visible...
- Q A spherical surface separates air medium for which 1 615 for violet and u 1 600 for red color A paraxial beam parallel to optic axis is incident on the...
- Q 15 O 5 m 5 m En X lish En A plane mirror is placed on x z plane and is free to rotate about z axis A fixed object...
- Q A ray of light is incident on a prism at surface AB Side AB AC are equal and base BC is silvered then find net angle of deviation of emergent...
- Q A ray of light falls on a transparent sphere as shown in the figure If the final ray emerges from the sphere parallel to the horizontal diameter then calculate the...
- Q Name of the Student Note Tie up this paper to main answer sheet Instructions i Answer all the questions ii Each answer has four alternatives Select the right one from...
- Q In a compound microscope the object is 1 cm from the objective lens The lenses are 30 cm apart and the intermediate image is 5 cm from the eyepiece The...
- Q Chromatic aberration refers to Difference between refractive index of lens material and the surrounding When white light passes through thick lenses red and blue colours focus at different points Different...
- Q In an industrial unit physical parameters like temperature pressure and strain are to be monitored continuously Fibre optic sensors are transducers which generally consist of light source coupled with an...
- Q The magnifying power of a simple microscope when final image is at near point is 3 The focal length of its lens in metres will be least distance of distinct...
- Q The deviation suffered by a ray is 60 when it is incident on a face of a prism at angle of incidence equal to 30 The angle of emergence is...
- Q Two thin prisms A and B are made of glass of refractive index 1 4 and 1 5 They are combined with each other so that this combination produces dispersion...
- Q A prism has two acute angles of 30 each and refractive index of 1 5 If two parallel light rays AB and CD are incident as shown in the figure...
- Q produces a real image of an object located outside the medium irrespective of its location A always may be if refractive index of surrounding medium is greater than 1 may...
- Q For much larger magnifications one uses two lenses one compounding the effect of the other instead of a single lens as in case of simple microscope because A simple microscope...
- Q A concave mirror of centre of curvature R and a rod AB of length are arranged as shown in figure Distance between centre of rod with mirror is x distance...
- Q English En Electromagnetic radiations of intensity 1 W m strikes on the surface of a substance which reflect 80 incident radiation back into same medium The radiation pressure on the...
- Q For the given arrangement find out the path travelled by the incident ray within the slab in meter 2 m 2 3 O 3 2 3 2 2 2m air...
- Q Two thin partially silvered glass plates are rigidly joined to form an angle 45 as shown in the figure A short light pulse is incident on the structure as shown...
- Q PQR is an isosceles prism in which point 5 is the mid point of the face PQ The refractive index of the prism is 3 and its face QR is...
- Q ABCA is cross section of a transparent material of refractive index u is shown in figure One of its refracting surface AC is given by y x A ray of...
- Q D A ray is incident on a plane refracting surface as shown in the figure The incident ray vector is A 2 3 1 2 If the refractive index of...
- Q There is an equiconvex lens of curvatu refractive index 1 5 kept before a plane refracting surface of index An object O is placed at a distance 2 R from...
- Q To read a poster on a wall a person with defective vision needs to stand at a distance of 0 4 m from the poster A person with normal vision...
- Q A concave mirror of focal length 3 m is moving in the x y plane with a velocity 41 4 m s A point source S is also moving in...
- Q 6 The distance of a real object from the focus of a convex mirror of radius of curvature R is d Then One More Correct Answer s A B Review...
- Q X Sorry Your Answer is Incorrect you scored 1 0 YOUR TIME ON AVG TIME OVERALL CORRECT Im 54s 3m 32s 24 TL Two plane mirrors are held at an...
- Q 20 If an object of height 5cm was kept in front of the lens of power 1 D 1 at a distance 2 cm from it at what distance the...
- Q Shown in the figure is a bi convex lens made of different transparent strips of two different refractive indices If the parallel rays of lig incident on the lens then...
- Q Light incident normally on a plane mirror attached to a galvanometer coil reflects backward as shown in figure A current in the produces a deflection of 3 5 of the...
- Q When scattering sunlight is being caused by air molecule in sky it radiate energy B C Equally in all direction Maximum energy in the direction of oscillations No energy in...
- Q A sphere of refractive index 2 is kept in a space whose centre is O A ray is incident at point A of the sphere and after refraction at A...
- Q A ray is incident on a curved spherical mirror of radius of curvatue 10 cm along a vector 1 21 2k The direction of normal at the point of incidence...
- Q Assertion A concave lens is called a converging lens Reason Concave lens disperses the incoming light Both A and R are true and R is the correct a explanation of...
- Q The rear view mirror of a car is a plane mirr or The car is at rest on a highway A truck is viewed at a distance of 200 m...
- Q An object is placed at a distance 3m from a thin equi convex lens at a point on its optical axis Its image is formed at 2 m from the...
- Q At what angle must two plane mirrors be placed so that the incident and resulting reflected rays are always parallel to each other noils 1 0 3 60 2 30...
- Q c In an aquarium a fish 6 cm long is swimming directly towards the plane glass front If at a certain moment head of the fish is 18 cm behind...
- Q This section contains I Assertion Reason type question which has 4 choices A B C and D out of which ONLY ONE is correct A The sky appears blue due...
- Q A real object is placed at 5 CM from a concave Mirror A plane Mirror is set so that the virtual image formed by it coincide with the real image...
- Q A beam of white light falling on a glass prism gets split into seven colours marked I to 7 as shown in the diagram From given spectrum the numbers for...
- Q exhibit significantly different optical behavior without violating any physical laws Since n is negative it results in a change in the direction of propagation of the refracted light However similar...
- Q two plane mirrors P and Q are inclined at an angle of 75 degree to each other a ray of li ght is incident to mirror P at an angle...
- Q An object of height 3 0 cm is placed vertically on the principal axis of a convex lens When the object distance is 37 5 cm an image of height...
- Q In the diagram shown all the velocities are given with respect to earth What is the relative velocity of the image in mirror 1 with respect to the image in...
- Q 9 Using simple ray theory describe the mechanism for the transmission of light within an optical fiber Briefly discuss with the aid of a suitable diagram what is meant by...
- Q In one book it is written that optical fibr es are fabricated such that the light refl ected at one side of inner surface strike s the other at an...
- Q Three lenses A B and C are placed in contact The magnifications produced by the lenses are individually 2 3 and 4 respectively The net magnification produced by the lens...
- Q I wo plane mirrors are placed perpendicular to each other as shown A ray of light is incident on one mirror at 75 What will be th e angle of...
- Q The image of a small dot fixed on the wall of a room is to be obtained on the opposite wall 4 m away by means of a large convex...
- Q A convex lens produces an inverted image of size 1 4 cm The size of object is 0 7 cm What is magnification in this case O 1 2 sec...
- Q Focal length of a convex lens is equal to 10 cm The power of lens is equal to 0 1 D 10 D se 01D
- Q A spherical thick shell made of transparent material is cut along its chord as shown The smaller part will A behave like a converging lens in air C behave like...
- Q Among the following choose the correct option s Optically denser medium always has a larger mass density Turpentine is optically denser than water Mass density of turpentine is higher than...
- Q There is a convex mirror of radius of curvature 20 cm The image of a point at a distance 100 cm from the pole of mirror on its axis will...
- Q An object is placed at a distance 20 cm in front of a concave mirror of focal length 40 cm Find the magnification of the image formed by the mirror...
- Q Light from a point source in air falls on a spherical glass surface n 1 5 and radius of curvature 10 cm The distance of the light source from the...
- Q Suppose that the upper half of a convex lens is covered with an opaque non reflective material what will be the effect on the image of an object placed in...
- Q 20 A ray of light starting from air passes through medium A of refractive index 1 50 enters medium B of refractive index 1 33 and finally enters medium C...
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