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A mobile phone lies along the principal axis of a concave mirror, as shown in Fig. . Show by suitable diagram, the formation of its image. Explain why the magnification is not uniform. Will the distortion of image depend on the location of the phone with respect to the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A converging lens axially in contact with a diverging lens; both the lenses being of equal focal lengths. What is the focal length of the

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(i) A ray PQ of light is incident on the face AB of a glass prism ABC (as shown in the figure) and emerges out of the face AC. Trace the path of the ray. Show that `/_i+/_e=/_A+/_delta` where, `delta` and e denote the angle of deviation and angle of emergence respectively. Plot a graph showing the variation of the angle of deviation as a function of angle of incidence. State the condition under which `/_delta` is minimum. (ii) Find out the relation between the refractive index `(mu)` of the glass prism and `/_A` for the case, when the angle

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two slits are made one millimetre apart and the screen is placed one metre away. What is the fringe separation when bluegreen light of wavelength 500 nm is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What is the effect on the interference fringes in a Young’s double-slit experiment due to: the separation between the two slits is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Discuss the intensity of transmitted light when a polaroid sheet is rotated between two crossed

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Unpolarised light is incident on a plane glass surface. What should be the angle of incidence so that the reflected and refracted rays are perpendicular to each

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What is the shape of the wavefront in each of the following cases: Light emerging out of a convex lens when a point source is placed at its

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B. Which of the two receivers picks up the larger signal when D is turned

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What is the path difference for the two waves as given in the fig.`theta' is 'pi/20

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The maximum kinetic energy of photoelectron is 2.8 eV. What is the value of stopping

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Show does the force between two point charges change if the dielectric constant of the medium in which they are kept

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An infinite plane of charge with `sigma=2epsilon_0''C/ m^2`is tilted at a 37° angle to the vertical direction as shown below. Find the potential difference, `V_A–V_B` in volts, between points A and B at 5 m distance apart. (where B is vertically above

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A small sphere whose mass is 0.1 gm carries a charge of `3 xx10^(-10) C` and is tieup to one end of a silk fibre 5 cm long. The other end of the fibre is attached to a large vertical conducting plate which has a surface charge of `25 xx10^(-6) Cm^(-2)` , on each side. When system is freely hanging the angle fibre makes with vertical is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Equal charges q are placed at the vertices A and B of an equilateral triangle ABC of side a. The magnitude of electric field at the point c is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The sum of the numbers 436.32, 227.2 and 0.301 inappropriate significant figures

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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If velocity of light c, Planck’s constant h and gravitational contant G are taken as fundamental quantities then express mass, length and time in terms of dimensions of these

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The displacement of a particle is represented by the equation `y = sin^3 ωt` . The motion

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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What is SHM?

asked Mar 17, 2022 in 11th Physics by anonymous

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Which among the curves shown in Fig. cannot possibly represent electrostatic field lines?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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