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Assume that light of wavelength 6000Å is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100

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

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What is the Fresnel's distance? For what distance is ray optics a good approximation when the aperture is 3 mm wide and the wavelength is 500

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

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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

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Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of reflected, Refractive index of water is

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

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Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of refracted light? Refractive index of water is

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 diverging from a point

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

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What is the shape of the wavefront in each of the following cases: The portion of the wavefront of light from a distant star intercepted by the

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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Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass

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

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In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the

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

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In Young’s double-slit experiment using monochromatic light of wavelength λ, the intensity of light at a point on the screen where path difference is λ, is K units. What is the intensity of light at a point where path difference is

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

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A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find the distance of the third bright fringe on the screen from the central maximum for wavelength 650

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

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A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes in a Young’s double-slit experiment. What is the least distance from the central maximum where the bright fringes due to both the wavelengths

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

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In a double-slit experiment the angular width of a fringe is found to be 0.2° on a screen placed 1 m away. The wavelength of light used is 600 nm. What will be the angular width of the fringe if the entire experimental apparatus is immersed in water? Take refractive index of water to be

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

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What is the Brewster angle for air to glass transition? (Refractive index of glass =

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

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Light of wavelength 5000 Å falls on a plane reflecting surface. What are the wavelength and frequency of the reflected light? For what angle of incidence is the reflected ray normal to the incident

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

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Estimate the distance for which ray optics is good approximation for an aperture of 4 mm and wavelength 400

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

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The 6563 Å Hα line emitted by hydrogen in a star is found to be redshifted by 15 Å. Estimate the speed with which the star is receding from the

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

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