Olympiad (Class 12) Radiation and Spectra — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Olympiad (Class 12) Radiation and Spectra in the app →The distance covered by one complete cycle of a wave is called its:The number of wave cycles passing a point each second is the wave's:One cycle per second is also given the unit name:Wavelength and frequency are linked because all electromagnetic waves share the same:Compared with short waves, waves with longer wavelengths have frequencies that are:A packet of electromagnetic energy behaving like a particle is called a:Among the colours of visible light, the photons with the highest energy are:Compared with an X-ray, a radio wave carries energy that is:As light travels farther from its source, its strength becomes:The full range of electromagnetic radiation, from radio to gamma rays, is the:High frequency waves from space must be observed from orbit because they are stopped by the:Low frequency radio waves from space are blocked by Earth's:As an object is heated, the motion of its atoms and molecules becomes:The law stating that hotter bodies peak at shorter wavelengths is:Two stars differ in colour. The blue one, compared with the red one, is:Astronomers give stellar temperatures on which scale?The Stefan law says the energy flux of a blackbody depends on temperature raised to the power:White sunlight passed through a prism spreads into a rainbow band called a:A thin cool gas in front of a hot source produces dark lines known as:A hot thin gas seen with no bright source behind it shows bright:A star moving away from us has its spectral lines shifted towards the:The Doppler effect responds only to the part of a star's motion that is: