Physics question and answers for November 11, 2023
- Q A diminished image of an object is to be obtained on a screen 1 0 m away from it This can be achieved by approximately placing A length B A...
- Q Regular surface forms clear image while irregular surface forms blurry or no image We are irregular surfaces but people can see us clearly as an object If a mirror or...
- Q A point object O is kept in front of a plane mirror MM The line MOP makes an angle 60 with the mirror An observer is walking along the line...
- Q A pencil is placed upright at a distance of 10 cm from a convex lens of focal length 15 cm The nature of the image of the pencil will be...
- Q 23 Light takes time t to X1 vacuum and the same light takes time to to travel a distance x in a medium The critical angle for that medium is...
- Q I need a bird s eye view figure with the entire path of light and labels and explanation of h ow exactly the backscattering or deflection of light happens in...
- Q A point object O is placed at distance of 20 cm from a convex lens of focal length 10 cm as shown in figure At what distance x from the...
- Q 9 The critical angle for refraction from medium 1 to air is and that from medium 2 to air is If medium 2 is denser than medium 1 Find the...
- Q A plane mirror is placed on x z plane and is free to rotate about z axis A fixed object is on x y plane at a point O 5...
- Q Please please please explain differentiate and tell the sig n of u and v in case of virtual object real object virtual ima ge real image in case of different...
- Q An equi convex lens u 1 5 is combined with an equi concave lens u 1 3 The radii of curvature of all surfaces is the same Assume thin lenses...
- Q 6 A simple telescope consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focussed on a distant object in...
- Q A concave lens of focal length 15 cm and a convex lens of focal length 30 cm are placed 15 cm apart with their principal axes coinciding A beam of...
- Q A balloon is rising up along the axis of a stationary concave mirror of radius of curvature 20m A ball is dropped from the balloon at a height 15 m...
- Q Focal length of a glass lens 1 5 in air is 20 cm If it is dipped in water its focal length in water will be Only one correct answer...
- Q One surface of an equiconvex lens of 1 5 and R 20 cm is silvered When an object is placed at distance x cm as shown a real image which...
- Q 16 The reflected light wave and incident light differ from each other by a phase angle of when 17 1 Light enters into glass from air 2 Light enters into...
- Q A prism placed in air made up of flint glass is such that any incident ray on one surface does not emerge from the second surface Critical angle for flint...
- Q A 4 0 mm high object is placed on the axis of a lens It is placed at12 5 cm away from the lens with a focal length of 5...
- Q A telescope fo 140cm fe 5cm is used to view a distant tower 100 m high situated at a distance 3 km The tower is made of iron channels consisting...
- Q A person 1 6 m tall is standing at the centre between two walls three metres high What should be the minimum size of a plane mirror fixed on the...
- Q 9 ALLE A symmetrical double convex lens is cut in two 3 equal parts by a plane containing the principal axis If the power of the original lens was 4D...
- Q Could you please tell me the effecti ve focal length of the system mirror formed Please provide stepwise explanation Q 2 Figure shows a concavo convex glass alg lens having...
- Q For a prism of refractive index 1 5 the angle of minimum deviation is equal to angle of prism Then prism angle will be 1 2 sin 3 4 2...
- Q Consider the compound lens optical system below with a 1cm object ho 20cm in front of lens 1 Lens 1 has focal length f1 2cm and lens 2 has focal...
- Q 32 A sphere has its right half polished so as to act as a mirror A paraxial light ray is incident from left reflects parallel to the incident ray as...
- Q 2 A point light source is located at a distance L from a screen A thin converging lens of focal length f L 4 and aperture radius R held parallel...
- Q A person can see distinctly up to a distance of 2 m an no further To see distinctly up to a long distance wh type of spectacles should he use...
- Q A short sighted person can see distinctly the object sit uated at a distance of 20 cm from him What type of lens will he use to see the objects...
- Q a person with spectacles of power 3 m 1 can see di tinctly the letters of newspaper placed at a distance o 25 cm from the eye At what distance...
- Q A short sighted person can read a book only up to 15 cm from his eyes To read a book placed at a distance of 25 cm from him what...
- Q 1 A telescope produces images of far object near to eye 2 A telescope produces images of far object magnified 3 A microscope produces images of near object magnified 4...
- Q A person using spectacles having power 2 5 m 1 can see the objects distinctly at a distance of 25 cm What is the near point for the person What...
- Q A ray of light in air is incident on a glass plate at polarising angle of incidence It suffers a deviation of 22 on entering glass The angle of polarisation...
- Q L A ray of light in air is incident on a glass plate at polarising angle of incidence It suffers a deviation of 22 on entering glass The angle of...
- Q A ray of light passes from vacuum into a medium of refractive index n If the angle of incidence is twice the angle of refraction then the angle of incidence...
- Q The magnifications for two positions of image of the same lens are 3 and 2 of a fix point object on a fix screen when the distance between the two...
- Q In a modified YDSE monochromatic uniform and parallel beam of light of wavelength 6000A and intensity W m is incident normally on two circular apertures A and B of radii...
- Q A liquid of refractive index 1 62 is placed in between two identical plano convex lenses as shown in figure A and B If refractive index of material of lens...
- Q 8 An equiconcave diverging lens of focal length F is cut into two equal halves The two halves are turned around and joined with some liquid between them The lens...
- Q A lens of diameter 5 0 cm and focal length f 20 0 cm was cut along the diameter into two identical halves In the process a thin layer of...
- Q A point object O is placed at distance of 30 cm from a convex lens of focal length 15 cm as shown in the figure At what distance x from...
- Q The difference in the number of waves when yellow light propagates through air and vacuum columns of th same thickness is one The thickness of the air column is mm...
- Q A lens of focal length f 40 cm is cut along the diameter into two equal halves In this process a layer of thickness 1mm is lost then halves are...
- Q With regards to a telescope whi statement is incorrect NCERT Pg 34 1 Telescope is used to provide angu magnification of distant objects 2 Telescope has objective lens of lar...
- Q OSH ershock to In the diagram the arrow is a real object of length 0 1 cm What is the size of the image obtained after the light rays pass...
- Q 4 3 A pile 4 m high stands in the lake such that it appears 1 m above the surface of water if refractive index of water is and sun...
- Q R R 2 The minimum required size of plane mirror to visualize complete image of an object is Half of size of object 2 Is same as size of object...
- Q If s us and we are refractive indices of A B and C respectively such that a c total internal reflection can take when a ray of light travels from...
- Q 16 A prism has prism angle of 60 and its absolute refractive index is 1 76 The prism is dipped in a transparent liquid of refractive index x If the...
- Q 15 A simple magnifier has converging lens of focal length 2 5 cm What is its linear magnification for the image formed at near point NCERT Pg 341 1 6...
- Q A ray of light is incident from a denser to rarer medium The critical angle for total internal reflection is 8c and the Brewster s angle of incidence is 8...
- Q A glass slab of thickness 4 cm contains the same number of waves as 5 cm of water When both are traversed by the same monochromatic light If the refractive...
- Q In an experiment a plane wave passing through a medium represented by E z t Eg sin 4 5x10 7 3 10 4 5 10 i The refractive index of...
- Q 4 5 3 Cylindrical 4 Both 1 Wave fronts associated with point sources are 1 Cylindrical 2 Spherical 3 Planar 4 Both 1 and 3 The value of angle r...
- Q 4 1 1 GO0082 ng power 8 apart The 89 GO0088 The focal lengths of the objective and eye piece of a telescope are respectively 100 cm and 2 cm...
- Q Qs When the object is placed at a distance of 3 2 focal lengths from a convex mirror the type of image formed in O A Erect and real O...
- Q A beam of light from a source is incident normally on a plane mirror fixed at a distance 2m from the source The beam reflected back as a spot on...
- Q of focal length 97 cal length 2cm 50 meter tall at is the height by the objective Pre Medical Physics 61 A myopic person can not see objects lying beyond...
- Q 60 80 Pre Medical Physics Two lenses of focal length 10 cm and 15 cm when put in contact behave like a convex lens They will have zero longitudinal chromatic...
- Q 2 Let the xz plane be the boundary two transparent media between Medium 1 in z 20 has a refractive index of 2 and medium 2 with z 0 has...
- Q 7 In figure ABC is the cross section of a right angled and ACDE is the cross section of a glass slab The value of 0 so that light incident...
- Q 6 A spherical surface of radius of curvature R separates air refractive index 1 0 from glass refractive index 1 5 The centre of curvature is in glass A point...
- Q GO0051 52 Three prisms 1 2 and 3 have the prism angle A 60 but their refractive indices are respectively 1 4 1 5 and 1 6 lf 8 82...
- Q sm GO0050 to th 51 For a prism graph between angle of deviation 8 and angle of incidence will be 14 ex 52 9 15 DW 18 34 he 1...
- Q GO0029 0 When a ray of light enters a medium of refractive index it is observed that the angle of refraction is half of the angle of incidence is than...
- Q GO0045 6 If the refractive indices of crown glass for red yellow and violet colours are 1 5140 1 5170 and 1 5318 respectively and for flint glass these are...
- Q GO0048 54 The refractive index of the material of a prism is 2 and its refracting angle is 30 One of the refracting surfaces of the prism is silvered A...
- Q 31 White light is incident on the interface of glass and air as shown in the figure If green light is just 38 totally internally reflected then the emerging ray...
- Q 4 A ray of light passes through equilateral Prism u 1 5 such that angle of incidence is equal to angle of emergence and the later is equal to 3...
- Q A 20 cm high object is placed on the principal axis of a concave mirror at a distance of 12 cm from the pole If the image is inverted real...
- Q 8 The angle of minimum deviation measured with a prism is 30 and the angle of prism is 60 The refractive index of prism material is 1 2 2 2...
- Q Q6 Two coins are placed one is under 35 cm of water other 35 cm of glass The coins are at equal distances from your eye Which one appears closer...
- Q Q3 A light beam converges to a point P A lens is placed in the path of convergent beam at a distance of 12 cm from P If the lens...
- Q A ray incident at a point at an angle of incidence of 60 enters a glass sphere of 3 and is reflected and refracted at the farther surface of the...
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