Physics question and answers for November 10, 2023
- Q plz tell me what are these 2 formulas for and what is re solution power of microscope and telescope 01 We can apply a similar argument to the objective lens...
- Q A ray of light is incident on a prism of angle A and refractive index u will not emerge out of prism for any angle of incidence if 1 sin...
- Q 4 bottom of beaker containing water water 3 36cm from pole of lens and mirror is at 100 cm from lens f 30 cm A 105 cm 36 cm B...
- Q Options The focal length of a concave mirror is 30 cm Find the position of the object in front of the mirror on axis so that image is three times...
- Q Consider a particle moving towards convex mirror along its principal axis with velocity 10 m s as shown The velocity of the mirror is 2 m s The velocity of...
- Q Consider a system of two lenses L and L which are combined as shown 1 5 1 2 0 All curved surfaces have equal radius of curvature of 20 cm...
- Q Consider a system of two lens seperated by distance d A point object P is kept in front of diverging lens L L is convex lens Both lenses are thin...
- Q 3 A compound microscope has its length L and focal lengths of its objective and eyepiece are fo and fe respectively If least distance of distinct vision is D then...
- Q 7 A glass slab is kept over three coloured dots viz blue yellow and red If the coloured dots are viewed from the top then the dot appearing closest to...
- Q 6 A thin biconvex lens is kept on a plane mirror When an object is kept at 20 cm in front of the lens its image is formed at the...
- Q The image of point P when viewed from top of the slabe will be 1 2 1 5 cm 3 1 5 1 5 P 2 0 cm above P...
- Q The critical magnetic field for a solid in superconducting state a does not depend upon temperature c increases if the temperature decreases b increases if the temperature increases d does...
- Q A glass prism of refractive index is kept in air as shown in the figure An incident ray strikes at face AB at point M at an angle of incidence...
- Q the magnification formula is ha ving a negative sign before it plzz explain why it is there As i know that magnification formula is m f f u Why it...
- Q Three rays of light namely red R green G and blue B are incident on the face PQ of a right angled prism PQR as shown in the figure B...
- Q 15 A point source S is placed at the bottom of a transparent block of height 10 mm and refractive index 2 72 It is immersed in a lower refractive...
- Q in front of the centre of a mirror of width d hung vertically on a wall A man walks in front of the mirror along a line parallel to the...
- Q Two thin symmetrical lens of different nature have equal radii of curvature of all faces R 20 cm The lenses are put close together and immersed in water The focal...
- Q Time taken by a ray of light to travel through a glass slab of thickness 10 cm and refractive index 1 5 will be Take c 3 108 m s...
- Q View In English The graph shows how the reciprocal of magnification produced by a converging thin lens varied with object distance u in displacement method What was the focal length...
- Q A glass sphere 391 has a radius of curvature 20 cm Half of the surface of the sphere is now silvered A small object is now placed at a distance...
- Q O 15 cm A concave mirror is moving with velocity 41 27 cm s1 whereas a point object is moving with 81 11j cms 1 as shown in figure The...
- Q An object is moving with velocity as shown in figure If and V are velocities of two images in two plane mirrors M and M respectively such that V V...
- Q A point source is kept at the centre of a cube made of a transparent material of refractive index u 1 5 and side meter The total minimum surface area...
- Q p m C m D F q From the ray shown in figure we can see that n q will be a straight line Exercise In the given problem focal...
- Q 56 An astronomical telescope of tenfold angular magnification has a length of 44 cm The focal length of the objective lens is a 4 cm c 40 cm b 44...
- Q For the given system if R 10 cm R 15 cm R3 15 cm The system consists of two lenses placed in contact with each other The back surface is...
- Q For the given system if R 10 cm R 15 cm R 15 cm The system consists of two lenses placed in contact with each other The back surface is...
- Q An equi biconvex lens of focal length 10 cm is silvered as 3 shown in figure Refractive index of glass is equal to 2 0 Focal length of mirror silvered...
- Q An object is placed at a distance x from a hemisphere of radius R 20 cm and 2 as shown in figure When the object is viewed from right side...
- Q The length of the side of a transparent cube is 18 cm Inside the cube there is an air bubble If it is seen from one face of the cube...
- Q A small lateral object initially at a distance of 30 cm start moving at t O with initial velocity 5 m s toward the pole of a silvered equiconvex lens...
- Q A hemisphere of radius 4 cm is placed centrally on a cross mark When it is viewed directly from above what will be the position of the image for the...
- Q 4 A small fish is situated at a depth of 6 ft in a tank and at a distance of 4 5 ft from the bank A boy of height...
- Q The length of a fish is 12 cm The fish is advancing forward to the front glass face of an aquarium When the fish is at a distance of 36...
- Q 3 A small electric lamp is placed at a depth of 46 cm inside a tank full of water i Calculate the area on the surface of water through which...
- Q A concave mirror of focal length 8 cm is placed on a table with its reflecting face turned upwards The mirror con tains a little amount of water inside it...
- Q A ray of light is incident on a transparent block of refractive index 1 62 If the reflected ray and refracted ray are per pendicular to each other what is...
- Q 1 ABCD is the outline of a glass cube A horizontal ray of light enters the glass cube grazing the surface AB If the ray emerges from the face BC...
- Q 45 A ray of light is incident at 60 on one face of a prism of angle 30 and the emergent ray makes 30 with the incident ray The refractive...
- Q 0 A part of a straight stick is immersed in water in an inclined way When the immersed portion is viewed normally from the air above it appears to be...
- Q Surfaces of a thin equiconvex glass lens 1 5 have radius of curvature R Paraxial rays are incident on it If the final image is formed at a R distance...
- Q 0 A ray of light is incident on a glass sphere and it makes an angle a with the normal and then it is refracted at an angle B Calculate...
- Q A Initially AB is the interface of slab of refractive index u and air A ray of light strikes at AB at the critical angle C Oc Now a slab...
- Q cm start moving at t 0 with initial velocity 5 m s toward the pole of a silvered equiconvex lens as shown List l contains speed of image v with...
- Q A cylindrical tube filled with water 4 3 is closed at one end by silvered plano convex lens as shown in figure Refractive index of lens is 2 and radii...
- Q 18 Light ray passes through an isosceles prism 1 5 such that the angle of incidence is equal to angle of emer gence and is th of the angle of...
- Q B D In a thick glass slab of thickness and refractive index n a cuboidal cavity of thickness m is carved as shown in the figure and is filled with...
- Q An old aged person can read the newsp aper by keeping it at 80 cm in front of hi s eye What is the nature and power of I ens...
- Q 1 A ray of light from air is incident on a sphere of refractive index 3 If the angle of incidence is 60 calculate the angle between the incident ray...
- Q The image of an object placed in air formed by a convex refracting surface mathongo mathongo mathongo mothongo mathongo mathon 2nd is at a distance of 10 m behind the...
- Q 43 The focal length of the objective and eye lenses of a microscope are 1 6 cm and 2 5 cm respectively The distance between the two lenses is 21...
- Q 60 A converging simply microscope lens of focal length f is used as If the least distance of distinct vision of the observer is D and the lens is held...
- Q 33 The plane face of a planoconvex lens is silvered If u be the refractive index and R the radius of curvature of curved surface then the system will behave...
- Q 41 Consider a thin prism of angle 3 and refractive index 1 5 A horizontal incident ray on prism is shown in figure If a plane mirror is vertically placed...
- Q A point source of light is placed at a depth of h below the calm surface of water From the source light rays can only be transmitted to air through...
- Q v u so if we put u and v for real img and real object t hen magnification should be ve Secondly if we put u and v for virtual...
- Q A ray of light travelling through a denser medium is incident at an angle i in a rarer medium If the angle between the reflected ray and the refracted ray...
- Q If the refracting angle of a prism is A the refractive index of its material is and the angle of deviation of a ray of light incident normally on the...
- Q An equi biconvex lens of focal length 10 cm is silvered as shown in figure Refractive index of glass is equal to 3 NIW 2 o Focal length of mirror...
- Q A ray of light is incident at an angle of 60 on a face of a prism with refracting angle 30 If the ray emerges from the other face and...
- Q A ray of light is incident at an angle of incidence 40 on a prism having refractive index 1 6 What should be the value of the angle of the...
- Q The refracting angle of a glass prism is 60 and the refractive index of glass is 1 6 If the angle of incidence of a ray of light on the...
- Q A thin lens forms image of intensity 1 If the central part of the lens of diameter half the diameter of lens is black polished then what will be the...
- Q 2 A ray of light passes normally through a slab u 1 5 of thickness 50 mm If speed of light in vacuum be 3 x 10 m s then...
- Q 1 A fish is a little away below the surface of a lake If the critical angle is 49 then the fish could see things above the water surface within...
- Q A plane mirror is placed at a distance 12 5 cm from focus of a concave mirror of radius of curvature 20 cm Find where an object can be placed...
- Q 2 With a concave mirror an object is placed at a distance x from the principal focus on the principal axis The image is formed at a distance x from...
- Q A prism of refractive index 2 and apex angle A is in air as shown Light is incident from PQ side at an angle of incidence i 0 i 90...
- Q A concave mirror forms the real image of an object which is magnified 4 times If object is moved 3 cm away the magnification of the image is 3 times...
- Q c 20 cm d 45 cm a 15 cm b 30 cm A concave mirror produces a real image 1 cm tall of an object 2 5 mm tall placed...
- Q Q 43 Your Answer f f Option 1 f f Option 2 f f Option 3 2f f2 Option 4 2f f2 Correct Answer 2f f A concave mirror of...
- Q A screen is kept at a distance of 1 m from the object A converging lens between the object and screen when placed at any two position 80 cm apart...
- Q Challenging Problem an object is placed Icm above the optical axis of a convex lens of focal length 40cm The object distan Ocm If the object now starts moving perpendicularly...
- Q Question 14 The refractive index of space changes with y whose f unction is given as 1 if y 0 u y ky if 0 sy s2yo if 2yo sys4yo...
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