Subject: Physics, asked 2 days, 6 hours ago

## Please give answer ! Subject: Physics, asked 2 days, 6 hours ago

## Please give answer! Subject: Physics, asked 2 days, 7 hours ago

Subject: Physics, asked 2 days, 7 hours ago

Subject: Physics, asked 2 days, 7 hours ago

## Please solve Q5 and Q6

Subject: Physics, asked 2 days, 9 hours ago

## Plz answer (ii) part... I am getting 6mm

Subject: Physics, asked 2 days, 10 hours ago

## Please provide the complete CBSE board paper solution of class 12th Physics (Delhi region) for the year 2022.

Subject: Physics, asked 2 days, 12 hours ago

## An electron is placed at each of the 8 cornersof a cube of side 'a' and an alpha particle at the center of the cube. Calculate potential energy of the system.

Subject: Physics, asked 2 days, 12 hours ago

## A ray of light travels from a denser to a rarer medium. After refraction, it bends away from the normal. When we keep increasing the angle of incidence, the angle of refraction also increases till the refracted ray gazes along the interface of two media.The angle of incidence for which it happens is called critical angle.If the angle of incidence is increased further the ray wil not emerge and it will be reflected back in the denser medium. This phenomenon is called total internal reflection of light. (i)The critical angle for a pair of two media A and B of refractive indices 2.0 and 1.0 respectively is (a) 0° (b) 30° (c) 45° (d) 60° (ii) The critical angle of pair of a medium and air is 30°. The speed of light in the medium is: (a) 1x 108 m s-1 (b) 1.5 x 108 m s-1 (c) 2.2x 108 m s-1 (d) 2.8 x10 m s-1

Subject: Physics, asked 2 days, 12 hours ago

## A ray of light travels from a denser to a rarer medium. After refraction, it bends away from the normal. When we keep increasing the angle of incidence, the angle of refraction also increases till the refracted ray gazes along the interface of two media.The angle of incidence for which it happens is called critical angle.If the angle of incidence is increased further the ray wil not emerge and it will be reflected back in the denser medium. This phenomenon is called total internal reflection of light. (a) A point source of light is placed at the bottom of a tank filled with water, of refractive index µ, to a depth d. The area of the surface of water through which light from the source can emerge, is: (b) For which of the following media, with respect to air, the value of critical angle is maximum ? (a) Crown glass (b) Flint glass (c)Water (d) Diamond

Subject: Physics, asked 2 days, 12 hours ago

## A ray of light travels from a denser to a rarer medium. After refraction, it bends away from the normal. When we keep increasing the angle of incidence, the angle of refraction also increases till the refracted ray gazes along the interface of two media.The angle of incidence for which it happens is called critical angle.If the angle of incidence is increased further the ray wil not emerge and it will be reflected back in the denser medium. This phenomenon is called total internal reflection of light. (i) A ray of light travels from a medium into water at an angle of incidence of 18° The refractive index of the medium is more than that of water and the critical angle for the interface between the two media is 20°. Which one of the following figures best represents the correct path of the ray of light? Subject: Physics, asked 2 days, 13 hours ago

## With the help of a ray diagram explain the working of a reflecting telescope. Mention two advantages of a reflecting telescope over a refracting telescope.

Subject: Physics, asked 2 days, 13 hours ago

## A slit of width 0.6 mm is illuminated by a beam of light consisting of two wavelengths 600 nm and 480 nm. The diffraction pattern is observed on a screen 1.0 m from the slit. Find (i) The distance of the second bright fringe from the central maximum pertaining to light of 600 nm. (ii) The least distance from the central maximum at which bright fringes due to both the wavelengths coincide.

Subject: Physics, asked 2 days, 13 hours ago

## (a) Use Bohr's postulate to prove that the radius of nth orbit in hydrogen atom is proportional to n2. (b) How will the energy of a hydrogen atom change if n increases from 1 to ∞ ?

Subject: Physics, asked 2 days, 13 hours ago

## Kindly answer the question A ray of light passes through a prism of refractive index √2 as shown in the figure. Find: (i) The angle of incidence (∠r2,) at face AC. (ii) The angle of minimum deviation for this prism.

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