Related InterviewSolutions

• If `I_0` is the intensity of the principal maximum in the single slit diffraction pattern. Then what will be its intensity when the slit width is doubled?A. `4I_0`B. `2I_0`C. `(I_0)/(2)`D. `I_0`
• A thin glass (refractive index 1.5) lens has optical power of `-5D` in air. Its optical power in a liquid medium with refractive index 1.6 will beA. `-1D`B. `1D`C. `-25D`D. `25D`
• A light of wavelength `6000 A` in air, enters a medium with refractive index 1.5 Inside the medium its frequency is….Hz and its wavelength is ….`A`
• A point source emits sound equally in all directions in a non-absorbing medium. Two points `P` and `Q` are at the distance of `9 meters` and 25 meters respectively from the source. The ratio of amplitudes of the waves at `P` and `Q` is…..
• A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination isA. `-1.5`dioptersB. `-6.5` dioptersC. `+6.5` dioptersD. `+6.67` diopters
• A convex lens if in contact with concave lens. The magnitude of the ratio of their focal length is `(2)/(3)`. Their equivalent focal length is 30 cm. What are their individual focal lengths?A. `-15,10`B. `-10,15`C. `75,50`D. `-75,50`
• Focal length of the plano-convex lens is 15 cm. A small object is placed at A as shown in the figure. The plane surface is silvered. The image will form at ` A. 60 cm to the left of lensB. 12 cm to the left of lensC. 60 cm to the right of lensD. 30 cm to the left of lens
• A diminished image of an object is to be obtained on a screen 1.0 m from it. This can be achieved by appropriately placingA. a concave mirror of suitable focal lengthB. a convex mirror of suitable focal lengthC. a convex lens of focal length less than 0.25 mD. a concave lens of suitable focal length
• A beam of light of wave length 600 nm from a distance source fall on a single slit 1mm wide and a resulting. Diffraction pattern is observed on a screen 2m away. The distance between the first dark fringes on either side of central bright fringe isA. 1.2 cmB. 1.2 mmC. 2.4 cmD. 2.4 mm
• In an experiment, electrons are made to pass through a narrow slit of width `d` comparable to their de Broglie wavelength. They are detected on a screen at a distance `D` from the slit (see figure)`. ` Which of the following graphs can be expected to represent the number of electrons `N` detected as a function of the detector position `y` (y=0 corresponds to the middle of the slit ).B. C. D.