Physics The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is Dispersion Diffraction Interference Reflection Dispersion Diffraction Interference Reflection ANSWER DOWNLOAD EXAMIANS APP
Physics An electron microscope gives higher magnification than an optical microscope, because : The electrons have more energy than the light particles The wavelength of electrons is smaller as compared to the wavelength of visible light It uses more powerful lenses The velocity of electron is smaller than that of visible light The electrons have more energy than the light particles The wavelength of electrons is smaller as compared to the wavelength of visible light It uses more powerful lenses The velocity of electron is smaller than that of visible light ANSWER DOWNLOAD EXAMIANS APP
Physics The magnifying power of an astronomical telescope can be decreased by Increasing the focal length of the objective Increasing the focal length of the eyepiece Decreasing the focal length of the eyepiece None of these Increasing the focal length of the objective Increasing the focal length of the eyepiece Decreasing the focal length of the eyepiece None of these ANSWER DOWNLOAD EXAMIANS APP
Physics The light rays used for eliminating bacteria Ultra-violet radiation Infrared rays X-rays Microwave radiation Ultra-violet radiation Infrared rays X-rays Microwave radiation ANSWER DOWNLOAD EXAMIANS APP
Physics Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre? 4.33 diopters -4.33 diopters -12.33 diopters 12.33 diopters 4.33 diopters -4.33 diopters -12.33 diopters 12.33 diopters ANSWER DOWNLOAD EXAMIANS APP
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