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Show that for a material with refractive index μ ≥ `sqrt2` , light incident at any angle shall be guided along a length perpendicular to the incident

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

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The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 × 108 m

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

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Define the term 'coherent sources' which are required to produce interference pattern in Young's double slit

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

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A small transparent slab containing material of μ = 1.5 is placed along AS2 (Fig.). What will be the distance from O of the principal maxima and of the first minima on either side of the principal maxima obtained in the absence of the glass slab.AC = CO = D, S1C = S2C = d <<

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

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Answer the following questions: Quarks inside protons and neutrons are thought to carry fractional charges [(+2/3)e ; (–1/3)e]. Why do they not show up in Millikan’s oil-drop

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

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Why is this fact (two photon absorption) not taken into consideration in our discussion of the stopping

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

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Do all the electrons that absorb a photon come out as

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

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A neutron beam of energy E scatters from atoms on a surface with a spacing d = 0.1nm. The first maximum of intensity in the reflected beam occurs at θ = 30°. What is the kinetic energy E of the beam in

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

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A particle A with a mass mA is moving with a velocity v and hits a particle B (mass mB) at rest (one dimensional motion). Find the change in the de Broglic wavelength of the particle A. Treat the collision as

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

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How does the stopping potential applied to a photocell change if the distance between the light source and the cathode of the cell is

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

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On what factor does the retarding potential of a photocell

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

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Two point dipoles of dipole moment `vecp_1 and vecp_2`. are at a distance x from each other and `vecp_1`||`vecp_2`. The force between the dipoles is

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

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Which of the following is a wrong

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

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Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge of an

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

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If a charged spherical conductor of radius 10cm has potential v at a point distant 5 cmfrom its centre, then the potential at a point distant 15cm from the centre will be

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

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The displacement of a charge Q in the electric field `vecE = e_1hat i + e_2 hatj + e_3 hatk` is `vecr = ahati + bhat j` . The work done is

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

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State the number of significant figures in the following : (a) `0.007 m^2` (b) `2.64 × 10^(24) kg` (c) `0.2370 g

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

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A man walking briskly in rain with speed v must slant his umbrella forward making an angle θ with the vertical. A student derives the following relation between θ and v : tan θ = v and checks that the relation has a correct limit: as v → 0, θ →0, as expected. (We are assuming there is no strong wind and that the rain falls vertically for a stationary man). Do you think this relation can be correct ? If not, guess the correct

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

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There are many types of spring. Important among these are helical and spiral springs as shown in figure.(a) (b) Usually, we assume that the springs are massless. Therefore, work done is stored in the spring in the form of elastic potential energy of the spring. Thus, potential energy of a spring is the energy associated with the state of compression or expansion of an elastic spring.The potential energy of a body is increases in which of the following

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

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(a) Define the term relative velocity?(b) Write the expression for relative velocity of one moving with respect to another body when objects are moving in same direction and are moving in opposite directions?(c) A Jet airplane traveling at the speed of 500km/hr ejects its products of combustion at the speed of 1500km/h relative to the Jet plane. What is the speed of the latter with respect to an observer on the

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

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