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Rotating a Mirror and the Reflected Ray Describing in which when a mirror is rotated through an angle, the reflected ray is rotated through twice that angle. You might drag th
Light from a monochromatic source of wavelength 4000A 0 is incident on a grating having 5000 rulings / cm. The spectrum is focused on a screen by a lens of focal length
Luminous flux and LASER: The luminous flux of a light source is measured in the units of LUMEN (lm). Lumen (lm) is the amount of light emitted per second by uniform (point) so
Ask An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 490 kg and a maximum acceleration of 2.24 m/s2 . Engineering safety sta
How noisy is an illuminator? It is very noisy, slightly so or completely silent, depending upon the power source and the construction. There heat dissipation is something which
Resistors of 20Ω ,20 Ω and 30Ω are connected in parallel. What resistance must be added in serieswith the combination to obtain a total resistance of 10 . If the complete
Beat period : The time interval among two successive beats is called as beat period. Beat frequency : The number of beats given per second is called as beat frequency.
Some sample
Diffraction pattern of a single slit of width 0.5 cm is formed by lens of focal length 40 cm. Calculate the distance between the first dark and the next bright fringe from the axis
how to frame constraint equations easily in physics for the chapter newtons laws of motion
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