Physics-Objective Related Question Answers
276. MASER was discovered by?
Charles.H.Towns
277. Full form of RADAR is?
Radio Detection and Ranging
278. RADAR was invented by?
Albert H.Taylor and Leo C. Young
279. The phenomenon of confining the vibrations of a transverse to a particular. . direction is called-?
Polarisation
280. A natural polarizing material is?
Tourmaline
281. Brewster's Law is associated with?
Polarisation of Light
282. A change in frequency of light wave when the source or the observer moves with respect to one another is called?
Doppler effect
283. High pitch of the siren of an approaching ambulance which passes an observer is due to?
Doppler effect
284. The pattern of arrangement of different types of electromagnetic radiations in the order of increasing wavelength?
Electromagnetic spectrum
285. Maximum wavelength of electromagnetic wave?
Radio waves
286. Waves used for communication through satellite?
Microwaves
287. Electromagnetic waves with shorter wavelength?
X-rays
288. Two types of X-rays are?
Soft X-rays & Hard X-rays
289. X-rays were Discovered by?
Roentgen
290. Rays used to study the internal atomic structure of crystal?
X-rays
291. Rays appear to be originated from outside of earth is called ?
Cosmic rays
292. Cosmic rays was discovered by?
Victor Hess
293. Infrared Rays was discovered by?
William Herschel
294. Heat rays emitted by sun is?
Infrared rays
295. Rays is used in TV remote is?
Infrared rays
296. Rays is used in distant photography is?
Infrared rays
297. Heat of sun is due to?
Infrared rays
298. The electromagnetic radiation with wavelength ranging from 10nm to 380nm?
Ultraviolet Rays
299. The rays used for identifying the counterfeit currency is?
Ultraviolet Rays
300. The rays Used to fill inside the tube lights is?
Ultraviolet Rays
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