Physics question and answers for November 08, 2023
- Q 58 Two plane mirrors are inclined at 70 A ray incident on one mirror at angle 0 after reflection falls on second mirror and is reflected from there parallel to...
- Q A narrow parallel beam of light falls on a glass sphere of radius R and refractive index at normal incidence The distance of the image from the outer is given...
- Q A convex lens of focal length 20 cm and a concave mirror having their principal axes along the same lines are kept 80 cm apart from each other The concave...
- Q A lens of focal length f 40 cmis cut along the diameter into two equal halves In this process a layer of thickness t 1 mm is lost The halves...
- Q 3 A ray of light passes from a denser medium to a rarer medium at an angle of incidence i Th reflected and refracted rays make an angle of 90...
- Q A plane trapezium is in a plane containing principal axis of a lens It s real image is formed The image is of the shape of a square The side...
- Q A transparent cylinder of radius R and height H made from a material of refractive index 1 5 is placed on a horizontal tabletop and a point light source is...
- Q The refractive index of diamond is 2 4 2 This statement tells that the speed o f light in diamond is 2 42 times less th an the speed of...
- Q What is the near point of a person whose eyes have an accommodated power of 58 0 D Assume that the distance from the cornea to the retina is 2...
- Q A light ray is coming parallel to principal axi the distance between ray and axis is equal focal length as shown Find the angle c deviation after reflection N 1...
- Q A broad beam of light is incident on a reflex surface If entire beam focuses at a single p P then nature of reflecting surface is 1 Parabolic 2 Spherical...
- Q A ray of light travelling in the direction i 31 is incident on a plane mirror After reflection it travels along the direction i 3 The angle of incidence is...
- Q 6 A convex lens of focal length 1 0 m and a concave lens of focal length 0 25 m are 0 75 m apart A parallel beam of light...
- Q 4 6 and 6 Plane mirror and an object has speeds of 5 ms and 10 ms respectively If the motion of mirror and object is along the normal of...
- Q Consider the diagram shown here f 40 cm 2 cm s 30 cm y 2 cm x 13 cm X An object O is approaching two halves of a lens...
- Q A point object O is going towards concave mirror as shown in the figure Choose the correct option representing direction of velocity of the image F is the focus and...
- Q The image produced by a concave mirror is quarter the size of object when the objec 12 5 cm from mirror If the object is mo 5 cm closer to...
- Q 59 Consider the ray diagrams for a concave mirror focal length fM and a convex lens focal length fr in air as shown in the figure below if What happens...
- Q Paraxial ray is that incident ray which is 1 Any ray parallel to principle axis 2 Any ray making small angle with principle axis 3 Ray incident close to pole...
- Q The refractive index of the medium with a certain region x 0 y 0 changes with y A thin light ray travelling in the x direction in medium having refractive...
- Q If object starts moving with 2 cms perpendicular to principal axis above the principal axis having real image two times magnified then 1 Image moves with velocity 4 cms below...
- Q 9 An equilateral glass prisms kept on a table has refractive index of u 2 It is illuminated by a marrow laser bearn having power P and wavelength The path...
- Q As shown in figure ABC is right angled isosceles prism kept in air A ray of light is incident on it normally as shown The refractive index for the material...
- Q 3 Four combination of two thin lenses lens and mirror are given in list I The radius of curvature of all curved surfaces is same and the refractive index of...
- Q A cubical vessel with non transparent walls is so located that the eye E of an observer can not see its bottom but can see all of the wall CD...
- Q 3 A thin biconvex lens of refractive index is placed on a horizontal plane mirror as 2 shown in the figure The space between lens and the mirror is then...
- Q 1 A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm If a plane mirror were put perpendicular to the...
- Q Image in convex mirror of the image of rod PQ in the plane mirror is radius of curvature of mirror is 60 cm 5 cm PH 15 cm 5 cm...
- Q What is the maximum angle of incidence in the figure for which the ray would satisfy the ondition for total internal reflection at the boundary of media of refractive indices...
- Q Show with detailed solutions and formula derivations if t here is any 15 m 53 f 10cm 30cm Find velocity of image
- Q Q46 A transparent slab of thickness d has a refractive index n z that increases with z Here z is the vertical distance inside the slab measured from the top...
- Q A mirror always forms virtual image of the magnification unity The focal length of the mirror is Less than 1 m but not zero Greater than 1 m but not...
- Q Q45 A plano convex lens is made of material of refrac tive index n When a small object is placed 30 cm away in front of the curved surface of...
- Q A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since 1 2 3 4 a large aperture contributes to the...
- Q 3 A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with a distance d...
- Q 9 NO 20 View in English A thin equiconvex lons has focal length 10 cm and refractive index 15 One of its faces is now silvered and for an object...
- Q An equiconvex air lens R R 10 cm is made in an glass medium having refractive index 3 2 changes magnitude A 3 2 C 1 8 Find the refractive...
- Q An object is placed at a distance f 2 from a convex lens The image will be 1 At one of the foci virtual and double in size 2 3...
- Q 1 Two plane mirrors are inclined at 70 A ray incident on one mirror at angle q after reflection falls on the second mirror and is reflected from there parallel...
- Q A cubical transparent slab is used as a paper weight What should be the minimum refractive index the material of the slab so that letters below it are not visible...
- Q C 12 22 D 9 Q 28 A four times magnified image was formed by a spherical mirror for the two object distances eithe 9 cm or 16 cm Focal...
- Q A ray of light is travelling from glas Refractive index of glass is 3 2 If the angle of incidence is 57 then the deviation of the ray is cosec...
- Q A person is unable to read the newspaper but he can read it by shifting it some distance further H is suffering from 1 Myopia 2 Hypermetropia 3 Cataract 4...
- Q A plano convex lens behave as a concave mirror of focal length 30 cm when its plane surface is silvered and as a concave mirror of focal length 10 cm...
- Q 8 A convex lens and a concave lens are kept in contact with common principal axes If f and f represents the focal length of the convex lens and concave...
- Q An object lies in front of a convex surface as shown in the figure First principal focus f 20 cm and second principal focus f 40 cm The position of...
- Q A convex lens of focal length 10 cm is cut along the line AB as shown in the figure a The parts of the lens are combined as shown in...
- Q For the given incident ray as shown in figure the condition of total internal reflection of this ray the required refractive index of prism will be a c 3 1...
- Q The sun subtends an angle of 0 5 when seen from the Earth If the image of the sun is formed with a convex lens of focal length 50 cm...
- Q ray of light is incident on the first mirror at an angle of incidence e 2 Then the reflected ray from the second mirror will make an angle of reflection...
- Q 5 Find the maximum value of r R so that the beam of light incident normally at the face A of a U shaped glass tube emerges through B as...
- Q When upper half of the lens is covered by an opaque screen 1 Half the image will disappear 2 Complete image will be formed of same intensity 3 Half image...
- Q 2 A ray of light that strikes a plane mirror PQ at an angle of incidence of 30 is reflected from the plane mirror and then strikes a second plane...
- Q A plane mirror OA of length 2 m is kept along the line y x as shown in the figure An insect having velocity of 41 cm s is moving...
- Q 23 There are two plane mirror with reflecting surfaces facing each other Both the mirrors are moving with the speed v away from each other A point object is placed...
- Q 127 A glass prism u 1 5 is dipped in water u 4 3 as shown in figure A light ray is incident normally on the surface AB It reaches...
- Q 20 Light traveling through three transparent substances follows the path shown in figure Arrange the indices of refraction in order from smallest to largest Note that total internal reflection does...
- Q 1 10 cm 3 20 cm A light pipe is made of glass fibre of refractive index 1 57 The outer covering of the pipe is made of a material...
- Q A plano convex lens having a radius of curvature of r 4 00 m is placed on a concave glass surface whose radius of curvature is R 12 0 m...
- Q Consider the situation shown in the figure Two slits S and S are placed symmetrically about the line OP which is perpendicular to screen The space between screen and slits...
- Q A plano convex lens has a thickness of 4 cm when placed on a horizontal table with curved surface in contact with it the apparent depth of the bottom most...
- Q REFRACTION AT LENS A boy is trying to start a fire by focusing sunli a piece of paper using an equiconvex lens of length 10 cm The diameter of the...
- Q A liquid of Refractive index 1 6 is contained in the cavity thin of a glass specimen of refractive index 1 5 as shown in the figure If each of...
- Q 2 A biconvex lens of focal length 10 cm is to be made on glass material If refractive index of the material is 1 5 what must be the radius...
- Q 38 The angle of a prism is A and if the angle of 3 minimum deviation is 180 2A then the refractive index of the material of the prism is...
- Q 12 I For the given incident ray as shown in figure the condition of total internal reflection of the ray will be satisfied if the refractive index of block will...
- Q 1112 m m 3 m m 2 For which of the following colour the magnifying power of a microscope 1 White colour 2 Red colour 3 Violet colour The length...
- Q A compound microscope consists of an objective lens of focal length 0 8 cm and an eyepiece of focal length 3 2 cm which are separated by a certain distance...
- Q In Fig ABC is the cross section of a right angled prism and ACDE is the cross section of a glass slab The value of 0 so that incident normally...
- Q A ray of light PQ is incident at angle i on a prism face See figure After 2 refractions it leaves the prism at a grazing angle B If u...
- Q 3 Deviation and dispersion 4 None of the above The ratio of angle of minimum deviation of a prism in air and when dipped in water will be 3 2...
- Q 10 Problem 9 A camera lens used for taking close up photographs has a focal length of 27 5 mm The farthest it can be placed from the film is...
- Q 40 An object and its real image are located at distances cm and 40 cm respectively from the two principal foci of convex lens The lateral magnification of the image...
- Q 16 Optical power also referred as dioptric power refractive power focusing power or convergence power is the degree to which a lens mirror or other optical system converges or diverges...
- Q f and f both become negative ght is incident from a medium into air at two possible gles of incidence A 20 and B 40 In the medium light avels...
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