The blue diode laser used for reading blu-ray disks has a wavelength of 405 nm. traditional dvd diode lasers use a red diode laser with wavelength of 650 nm. light from both diode lasers is directed onto a blu-ray disk that has 3125 lines/mm at an incident angle of 20º. calculate the angles of reflection/diffraction for all orders that would be present for both lasers.
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Three persons, Amar, Akbar and Anthony, invested different amounts in a fixed deposit scheme for one year at the rate of 12% per annum and earned a total interest of Rs. 3240 at the end of the year. .... The difference in compound interest and simple interest on a certain amount deposited for 3 years at 6% p.a. is Rs. 18 .
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