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A bar (L= 80 cm) moves on two frictional rails where the magnetic field is uniform (B = 0.30 T) and into the paper . If v = 50 cm/s and R = 60 mOmps, determine the magnitude and direction of the magnetic force on the moving bar.
We observe polarisation of light wave rather than sound wave explain it's physical implication
A yellow laser of wavelength 610nm is passed through a diffraction grating with 4.33×10^5 lines per metre. Determine the maximum number of orders possible.
Light waves are propagating in vacuum. Derive the wave equation for the associated magnetic field vector. On the basis of this equation, calculate the speed of light.
The distance between the image and the object in a plane mirror is 40cm if the distance of the object is reduced by 9.2cm, what is the distance of the object from the mirror?
A flower is placed 12.0 cm in front of a mirror. If an image of the flower is formed 3.0 cm in front of the mirror, what kind of mirror is it and what is the focal length of the mirror?
if an object is placed at 40 cm and its image is formed at 2 times focal length, where the image is inverted? then name the types of lens and find where the image is formed.
A grating has 10,000 lines per cm. Calculate the maximum number of principal maximum that can be formed for light of wavelength 487 nm.
A glass wedge of angle 0.01 radius is illuminated by a monochromatic light of wavelength 6330 falling normally it. At what distance from the of the the 20th fringe is observed
A ray EF of monochromatic light is incident on the refracting AB of a regular glass prism(refractive index=1.5)at an angle of incidence i=55°.if it emerges through the adjacent face AC..calculate angle of emergence
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