Physics question and answers for November 03, 2023
- Q A point source of light O is at a distance 2 m from a vertical screen AB An opaque object of height 0 5 m moves translationally at a constant...
- Q 20 A thin equiconvex lens has focal length and refractive index 1 5 One of its faces is now silvered and for an object placed at a distance u in...
- Q AT Q 1 i Monochromatic light of wavelength 589 nm is incident from air on a water surface If u for water is 1 33 find the wavelength frequency and...
- Q Find the position of final image from O for the arrangement shown Object 20cm 1 24 cm 3 40 cm 20cm f 40cm YA f 40cm 2 120 cm 4...
- Q A ray of light after successive reflections from two plane mirrors deviates totally through an angle 2000 What is the angle between the mirrors A 70 B 80 C 90...
- Q A diverging lens with magnitude of focal 12 length 25 cm is placed at a distance of 15 cm from a converging lens of magnitude of focal length 20 cm...
- Q What is the focus distance of a combined lens made by combining concave lens of 20 cm focus distance placed in contact with a convex lens of 30 cm focus...
- Q A cylindrical tube filled with water 4 3 is closed at its both ends by two silvered plano convex lenses as shown in the figure Refractive index of lenses L...
- Q To a fish in water a bird in air appears to be 4 at 30 cm from the surface If then the 3 true distance of the bird from the...
- Q As shown in the figure a monochromatic ray of light tavelling in air is incident perpendicular to side a of an equilateral triangle prism with 1 5 Which side will...
- Q Statement 1 When two plane mirrors are kept perpendicular to each other as shown O is the point object 3 images will be formed O Statement 2 In case of...
- Q 3 A converging mirror M a point source S and a diverging mirror M are arranged as shown in figure 18 E4 The source is placed at a distance of...
- Q By what angle should M be rotated so that the light ray after reflection from both the mirrors become horizontal 40 25 M
- Q In an experiment a convex lens of focal length 15 cm is placed coaxially on an optical bench in front of a convex mirror at a distance of 5 cm...
- Q Which one of the following instruments is used to study dispersion of light O Microscope O Telescope Spectrometer
- Q A concave mirror of radius R is kept on a horizontal table figure 18 E2 Water refractive index u is poured into it up to a height h Where should...
- Q A ray of light passes through a medium whose refractive index varies with distance x as X Ho 2 Calculate the time taken by a ray to a move from...
- Q A point object O is placed at distance of 15cm from concave morror between a concave and a plane mirror separated by 25cm Considering 1st reflection from concave mirror position...
- Q 19 A bird is flying up at angle sin 1 3 5 with the horizontal A fish in a pond looks at that bird When it is vertically above the...
- Q 11 The observer O sees the distance AB as infinitely large If refractive index of liquid is and that of glass is then is A 2 B 1 2 1...
- Q A ray of light undergoes deviation of 30 when incident on an equilateral prism of refractive index 2 The angle made by ray inside the prism with the base of...
- Q 8 In the figure ABC is the cross section of a right angled prism and ACDE is the cross section of a glass slab The value of q so that...
- Q 10 For a prism kept in air it is found that for an angle of incidence 60 the angle of refraction A angle of deviation and angle of emergence e...
- Q A sin 3 5 B sin 20 In the figure shown a point object O is placed in air A spherical boundary separates two media AB is principal axis The...
- Q 18 If a prism having refractive index 2 has angle of minimum deviation equal to the angle of refraction of the prism then the angle of refraction of the prism...
- Q H Consider the situation in figure The bottom of the pot is a reflecting plane mirror Refractive index of water is a At what distance s from itself will the...
- Q A glass hemisphere of refractive index 4 3 and of radius 4 cm is placed on a plane mirror A point object is placed at distance d on axis of...
- Q 5 Choose the wrong statement A A ray entering a material of larger index of refraction bends toward the normal B A ray entering a material of smaller index of...
- Q ylindrical vessel of diameter 12 cm contains 800m cm of water A cylindrical glass piece of diameter 8 0 cm and height 80 cm is placed in the vessel If...
- Q 13 The dotted part of the lens is cut and kept 1 on the x axis as shown in the diagram If parallel paraxial rays are falling on this system...
- Q 1 2 A boy is 1 8 m tall and can see his image in a plane mirror fixed on a wall His eyes are 1 6 m from the...
- Q Q 2 The radius of curvature of a spherical mirror is 20 cm What is its focal length
- Q PE QUESTION 4 0 The refractive indices of the crown glass for blue and red light are 1 51 and 1 49 respectively and those of the flint glass are...
- Q A point object is placed in front of a thick plane mirror as shown in figure Find the location of final image w r t object 1 15 2 cm...
- Q Figure show a mirrored equiconvex lens placed at 12 cm below water Find position of object above the surface of water in cm such that its image coincides with itself...
- Q In the diagram shown the lens is moving towards the object with a velocity 2 m s and the object is also moving towards the lens with the same speed...
- Q 24 23 vertically A sin 3 5 B sin 4 5 In the figure shown a point object O is placed in air A spherical boundary separates two media AB...
- Q A convex lens forms a real image 16 mm long on a screen If the lens is shifted to a new position without disturbing the object or the screen then...
- Q A biconvex lens has a radius of curvature of magnitude 20 cm Which one of the following options describe best the image formed of an object of height 2 cm...
- Q 5 A ray of light travelling in air falls on the surface whose refractive index is 2 If the angle of incidence is 45 find angle of refraction
- Q A prism of refractive index 2 has refracting angle 60 Answer the following questions In order that a ray suffers minimum deviation it should be incident at an angle A...
- Q 0 A light ray travelling in glass medium is incident on glass air interface at an angle of incidence 9 The reflected R and transmitted T intensities both as function...
- Q 25 A ball is dropped from a height of 20 m above the surface of water in a lake The refractive index of water is 4 3 A fish inside...
- Q 1 31 is incident on a plane mirror After reflection it travels A ray of light travelling in the direction along the direction 1 31 The angle of incidence is...
- Q 2015 see stope On a hot summer night the refractive index of air is smallest near the ground and increases with height from the ground When a light beam is...
- Q Diameter of a plano convex lens is 6 cm and thickness at the centre is 3 mm If the speed of light in the material of the lens is 2...
- Q ICS A convex lens is used to form an image of an object on a screen If the upper half of the lens is blackened so that it becomes opaque...
- Q A light ray I is incident on a plane mirror M The mirror is rotated in the direction as shown in the figure by an arrow at frequency 9 rps...
- Q 2 nsider the situation shown in figure 18 E16 The elevator is going up with an acceleration of 2 00 m s and the focal length of the mirror is...
- Q image a at 76 A gun of mass M fires a bullet of mass m with a horizontal speed V The gun is fitted with a concave mirror of focal...
- Q A point source S is placed midway between two converging mirrors having equal focal length f as shown in figure 18 E3 Find the values of d for which only...
- Q Illustration 40 A compound microscope consists of an objective of focal length 1 0 cm and an eyepiece of focal length 5 cm separated by 12 2 cm At what...
- Q Illustration 38 If a luminous point is moving at a speed vo towards spherical mirror of focal length f along its axis find the speed of the image
- Q 6 A right prism is to be made by selecting a proper material and the angles A and B BSA as shown in figure 18 W5a It is desired that...
- Q ration 36 A thin plano convex lens of focal length f is split into two halves One of the halves is shifted along the principal axis as shown The separation...
- Q A U shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure 18 E1 Find the total length of the image 10...
- Q d n 2 4 Air has refractive index 1 0003 The thickness of air column which will have one more wavelength of yellow light 6000 than in the same thickness...
- Q A convex lenses of focal length 40 cm is held coaxially 12 cm above a concave mirror of focal length 18 cm An object held x cm above the lens...
- Q 9 a An electromagnetic radiation of wavelength ranging between 400 nm and 1150 nm for which the plate is penetrable incident perpendicularly on the plate from above is reflected from...
- Q 20 Suppose that a ray of light leaves the point 3 4 reflect off the Y axis towards the X axis reflects off the X axis and finally arrives at...
- Q k 17 A submarine is 300 m horizontally out from the shore and 100 m beneath the surface of the water A laser beam is sent from the submarine so...
- Q of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm The power of this lens combination in diopters is 1997 2M...
- Q A plane mirror reflects a pencil of light to form a real ima Then the pencil of light incident on the mirror is MP PMT 1997 DCE 2001 03 KCET...
- Q A ray of light strikes a glass plate at an angle of 60 If the reflected and refracted rays are perpendicular to each other the refractive index of glass is...
- Q 6 Speed of light in water is 2 5 x 10 m s and in glass is 2 x 10 m s which has higher refractive index 15
- Q Two similar thin equi convex lenses of focal length feach are kept coaxially in contact with each other such that the focal length of the combination is F When the...
- Q Two plane mirrors are placed as shown in the figure and a point object O is placed at the origin mis JN me Sonal ay How many images will be...
- Q The image of an object formed by a plano convex lens at a distance of 8 m behind the lens is real and is one third the size 2 of...
- Q 6 A water proof laser pointer of length 10 cm placed in a water tank rotates about a horizontal axis passing through its center of mass in a vertical plane...
- Q the blanks with the correct words The band of light that is produced when white light is split is called dispersion spectrum
- Q 10 n A glass prism is immersed in a hypothetical liquid The curves showing the refractive index n as function of wavelength for glass liquid When a ray of white...
- Q The distance between an object and a divergent lens is m times the focal length of the lens The linear magnificatio produced by the lens is WB JEE 2009 a...
- Q An object placed at a distance of 9cm from first principal focus of convex lens produces a real image at a distance of 25cm from its second principal focus Then...
- Q Example 21 Find the ratio of the intensity at the centre of a bright fringe to the intensity at the point one quarter of the distance between two Sigmars fringes...
- Q 26 A ray of light suffers a minimum deviation when incident on an equilateral prism of refractive index 2 The angle of incidence is a 30 b 45 c 60...
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