Physics Radio waves sent out by a radio stations are reflected by Ionosphere Stratosphere Troposphere Mesosphere Ionosphere Stratosphere Troposphere Mesosphere ANSWER DOWNLOAD EXAMIANS APP
Physics Which type of radiation has the lowest penetrating ability? Gamma Alpha Beta All of these Gamma Alpha Beta All of these ANSWER DOWNLOAD EXAMIANS APP
Physics Optic fibres are used in : Ultrasound scans X-ray photos CAT scans Endoscopy Ultrasound scans X-ray photos CAT scans Endoscopy ANSWER DOWNLOAD EXAMIANS APP
Physics If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths? LUV < lIR < lVIS LUV > lIR > lVIS LUV < lVIS < lIR LUV > lVIS > lIR LUV < lIR < lVIS LUV > lIR > lVIS LUV < lVIS < lIR LUV > lVIS > lIR ANSWER DOWNLOAD EXAMIANS APP
Physics The phenomenon of light associated with the appearance of blue colour of the sky is Reflection Interference Refraction Scattering Reflection Interference Refraction Scattering ANSWER DOWNLOAD EXAMIANS APP
Physics Beta rays emitted by a radioactive material are Electromagnetic radiations Neutral particles Charged particles emitted by nucleus The electrons orbiting around the nucleus Electromagnetic radiations Neutral particles Charged particles emitted by nucleus The electrons orbiting around the nucleus ANSWER DOWNLOAD EXAMIANS APP
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