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A figure separated into squares, each of size 1 mm2 is being viewed at a distance of 9cm by a magnifying lens of local length 10cm, held close to the eye.
(i) Illustrate a ray diagram showing the formation of the image.
(ii) What is the magnification formed by the lens? How much is the area of each square in the virtual image?
(iii) What is the angular magnification of the lens?
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What is the maximum wavelength of the visible spectrum so that 3 rd order spectrum can be obtained by a plane diffraction grating having 5654 lines/cm?
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Magnification is the ratio of size of image to the size of object. hence it is a dimensionless constant. It has no units. 1/m is not its unit.(1/m is the unit of power=DIOPTRE)
Biot-Savart law (J.B. Biot, F. Savart) A law defines the contributions to a magnetic field through an electric current. This is analogous to Coulomb's law. Mathematically spec
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