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Can I please get solutions for this CASE Rehearsal Paper 2018 January. It is extremely important due to the level of difficulty.

​​​​​ ​​​ Can I please get solutions for this CASE Rehearsal Paper 2018 January. It is extremely important due to the level of difficulty. a. C. a. b. Construct a refracted wave front using the principle, when a plane wave front of light travels from medium to medium 2, so that speed of light is greater in medium 2 compared to medium and hence prove What is the advantage of using oil immersed specimens as objects for a 3 microscope instead of keeping the object in air? Justify. An unpolarised beam of intensity 10 is incident on a pair of polaroids making an angle Of 60) with each other. Calculate the intensity oi light emerging from the arrangement. An astronomical telescope is made of two convex lenses of focal length 100crn and 5cm. Calculate the magnifying power and length of the tube so that the final image is formed at infinity. List two reasons why audio signals converted to electromagnetic waves 3 cannot be transmitted as such in to space. A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2MHz. What are the frequencies of the side bands produced? ne maximum peak to peak voltage of an AM wave is 26mV and the minimum peak to peak voltage is 6mV. Find the modulation index. 18. 19. 21. a. Consider a hydrogen atom with its electron in the nth orbital. An 3 electromagnetic radiation of wavelength 90 nm is used to ionize the atom. If the kinetic energy of the ejected electron is 10.4 eV, then find the value of n. ( hc = 1242 eV nm) b. Name the spec•tral line series Of hydrogen atom which lies in the (i) visible region (ii) ultraviolet region the total numlx•r of neutrons and protons in a nuclear reaction is 3 conserved. then how energy is absorbed or released in the reaction? b. Two radioactive nuclei X and Y with half-life periods 1 hour and 2 hours respectively, initially contain equal numix•r Of atoms. Compare their ratio of disintegration after 8 hours a. Draw the circuit diagram of a PNP transistor amplifier in common emitter 3 configuration, b Emitter and collector region of a transistor are made up of same type of materials (either Ex.th N type or P type). Is it possible to interchange the emitter and collector of a transistor during connections? Explain Why special types of compound semi-conductors are used to make visible LED's? not Si or Ge. aw the circuit diagram of the special purpose diode used for regulating 3 uctuating DC voltage. b. lain the p rinciple and working of the device. 50f9 Q OR R a. In Young's double slit experiment, a monochromatic source of light S is kept equidistant from the slits Si and S2. Derive an expression Of li ht at any point on the screen and hence deriye the condition for or mation o ar and bri t frin es on the ath difference and wave eng o light from and S2. b w avavngtte, 650 nm and 520 Itm, is used to Obtain interference fringes in a Young's double-slit experiment. (i) Find the distance of the third dark fringe on the screen from the central 520 wavelength for ma xlmum (ii) What is the least distance from the central maximum where the bright fringes due to both the wavelengths coincide? (separation between the slits is 4 mm and the distance between the screen and plane Of the slits is 1.2m.) 90f9