Chapter 28 – Electromagnetic Waves

When a compact disc is illuminated by a source of white light, coloured lines are observed. This is due to coloured lines are observed. This is due to When a compact disc is illuminated by a source of white light October 27, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry [...]

An astronaut is looking down on earth’s surface from a space shuttle an altitude of 400 km Assuming that the astronaut’s pupil diameter is 5 mm and the wavelength of visible light is 500 nm, the astronaut will be able to resolve linear objects of the size of about : An astronaut is looking down [...]

A double slit experiment is performed with light of wavelength 500 nm. A thin film of thickness 2μm and refractive index 1.5 is introduced in the path of the upper beam. The location of the central maximum will The camera lens has an aperture of f and the exposure time is (1/60)s. What will be [...]

The camera lens has an aperture of f and the exposure time is (1/60)s. What will be the new exposure time if the aperture become 1.4 f ? The camera lens has an aperture of f and the exposure time is (1/60)s. What will be the new exposure time if the aperture become 1.4 f [...]

Two coherent monochromatic light beams of amplitude 3 and 5 units are superposed. The maximum and minimum possible intensities in the resulting beams are in the ratio Two coherent monochromatic light beams of amplitude 3 and 5 units are superposed. The maximum and minimum possible intensities in the resulting beams are in the ratio October [...]

In Young’s experiment, the monochromatic light is used to illuminate two slits S1 and S2 as shown. Interference fringes are observed on a screen placed in front of the slits. Now if a thin glass plate is placed normally in the path of beam coming from the slit S1, then Greater accuracy in the determination [...]

Greater accuracy in the determination of the position of a particle with an optical microscope can had, if the beam of light used Greater accuracy in the determination of the position of a particle with an optical microscope can had if the beam of light used October 27, 2020 Category: AIIMS Last 24 Years Solved [...]

At what angle of incidence will the light reflected from glass (μ=1.5) be completely polarized ? At what angle of incidence will the light reflected from glass (μ=1.5) be completely polarized ? October 27, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions , Chapter 16 - Waves , [...]

If focal length of human eye is 2 cm then find the focal length of contact lens such that a combined focus system of focal length 2.5 cm is obtained after using contact lens. If focal length of human eye is 2 cm then find the focal length of contact lens such that a combined [...]

Focal length of convex lens is 100 cm and focal length of concave lens is 8 cm. Find the magnification of the given combination of lens if object is placed at point O. Focal length of convex lens is 100 cm and focal length of concave lens is 8 cm. Find the magnification of the [...]