Recently Active Miscellaneous Questions

if g(x) = x2+bx+c and h(x) = x2+b1x+c1 do not have real roots, and f(x)=g(x)/h(x) then ...

what is the value of plank's constant? ...

The value of wavelength when the frequency is 3 Hz.. ...

The convex surface of a thin concavo-convex lens of glass of refractive index 1.5 has a radius of curvature 20 cm. The concave surface has a radius of curvature 60 cm. The convex side is silvered and placed horizontally. The ...

The convex surface of a plano convex lens is silvered whose radius of curvature is 30 cm. The focal length of the mirror thus formed is (refractive index of medium is 1.5) ...

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is ...

A thin concave and a thin convex lens are in contact. The ratio of the magnitude of power of two lenses is 3/2 and focal length of combination is 30 cm, then focal length of individual lenses are (concave and convex) ...

The concave surface of a thin concavo-convex lens of glass of refractive index 1.5 has a radius of curvature 20 cm. The concave surface has a radius of curvature 60 cm. The convex side is silvered and placed on a horizontal s ...

A concave lens of glass, refractive index 1.5, has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a ...

A thin convex lens of focal length 30 cm forms an image 2 cm high of an object at infinity. A thin concave lens of focal length 20 cm is placed 26 cm from the convex lens on the side of the image. The height of the image is n ...

A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen, ...

In the previous question, find the focal length of the lens when the rays are falling on the curved part first ...

A plano-convex lens has a thickness of 4cm. When placed on a horizontal table, with the curved surface in contact with it, the apparent depth of the bottom-most point of lens is found to be 3 cm. If the lens is inverted such ...

Two identical prisms of refractive index √3 are kept as shown in the figure. A light ray strikes the first prism at face AB such that the first prism has minimum deviation. Through what angle the prism DCE should be rotated ...

An isosceles prism of angle 120° has a refractive index 1.44. Two parallel monochromatic rays enter the prism parallel to each other in air as shown. The rays emerge from the opposite faces *Image* ...

A given ray of light suffers minimum deviation in an equilateral prism P. Additional prisms Q and R of identical shape and of the same material as P are now added as shown in the figure. The ray will now suffer ...

A thin prism P1 with angle 4° and made from glass of refractive index 1.54 is combined with another thin prism P2 made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of the prism P2 is ...

Q)) A bullet of mass 20 gram and velocity 500 m/s pierces ablock of mass 10 kg kept on a rough surface with coeff. (m). the bullet now obtains a velocity of 100 m/s.The block now comes to rest after travelling some distance i ...

What will be the minimum angle of incidence such that the total internal reflection occurs on both surfaces? *Image* ...

A rectangular glass slab ABCD of refractive index n1, is immersed in water of refractive index n2 (n1>n2). A ray of light is incident at the surface AB of the slab as shown. The maximum value of the angle of incident αmax ...

A ray of light from a denser medium strike a rarer medium at an angle of incidence i. The reflected and refracted makes an angle of 90° with each other. The angle of reflection and refraction are r and r'. The critical a ...

A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of 45°. The ray undergoes total internal reflection. If n is the refractive index of the medium wit ...

A beam of white light is incident on glass air interface from glass to air such that green light just suffers total internal reflection. The colors of light which will come out to air are ...

A light ray is incident on an irregular shaped slab of refractive index √2 at an angle of 45° with the normal on the incline face as shown in the figure. The ray finally emerges from the curved surface in the medium of the ...

A quarter cylinder of radius R and refractive index 1.5 is placed on a table. A point object P is kept at a distance of mR from it. Find the value of m for which a ray from P will emerge parallel to the table as shown in the ...

A parallel beam of light travelling in water (μ=4/3) is refracted by a spherical air bubble of radius 2mm situated in water. Assuming light rays to be paraxial, find the position of the final image ...

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 the glass. A point object P placed in air is found to have a real image in th ...

A point object is placed at the centre of a glass sphere of radius 6 cm and refractive index 1.5. The distance of virtual image from the surface is ...

A point object O is placed at a distance of 30 cm from the pole of the convex mirror of focal length 20 cm as shown in the figure. Find the final image distance from the object. *Image* ...

A ray of light (GH) is incident on the glass-water interface DC at an angle i. It emerges in air along the water air interface EF (see figure). If the refractive index of water μw is 4/3, the refractive index of glass μs is ...