CBSE Class 12 Wave Optics — practice questions
57 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Wave Optics in the app →In Young's double slit, $\lambda = 600$ nm, slit separation $d = 0.5$ mm, screen distance $D = 1$ m. Fringe wiIn single-slit diffraction with $\lambda = 500$ nm and slit width $a = 0.1$ mm, the angular position of the fiPolaroid sunglasses reduce glare from a wet road most effectively because:Light passes from air to glass ($n = 1.5$). Brewster's angle is:HUYGENS' PRINCIPLE states that every point on a wavefront acts as a:For two light sources to produce STABLE INTERFERENCE FRINGES, they must be:In Young's double-slit experiment, the fringe width β is given by:In Young's experiment, a BRIGHT fringe (constructive interference) requires path difference = ?In single-slit diffraction, the central maximum is:Polarisation of light is direct experimental evidence that light is a:BREWSTER'S LAW for the polarising angle θ_B relates to the refractive index n as:By Malus's law, if plane-polarised light of intensity I_0 passes through a polariser oriented at 60° to the poThe resolving power (RP) of a diffraction grating with N slits in the m-th order is:The corpuscular model of light was given in 1637 by:The corpuscular model is often attributed to Newton for his book:The wave theory of light was put forward in 1678 by:The speed of light in water was shown to be less than in air by:Foucault carried out that measurement in the year:The famous interference experiment of 1801 was performed by:Light was shown to be an electromagnetic wave by:Light waves are electromagnetic waves that are:A surface of constant phase in a wave is called a:Wave energy travels in a direction to the wavefront that is:The wavefronts from a point source are:Far from the source, a small part of the wavefront is nearly:Each point of a wavefront acts as a source of a:The next position of a wavefront is found by drawing a common:Huygens explained the missing backwave by taking the amplitude zero:Two sources whose phase difference does not change are:Coherent sources give an interference pattern that is:Two separate light sources lighting one wall are:When two sources are incoherent, their intensities:The increase in wavelength from the Doppler effect is called:Light with no preferred direction of vibration is:A polaroid is made of long chain molecules that are:In 1678 a Dutch physicist proposed that light travels as a wave. He was:Newton's famous book OPTICKS pushed which picture of light?Light bends towards the normal on entering water. The wave model predicts its speed in water is:Foucault measured the speed of light in water in 1850. He found it was:Young's 1801 interference experiment firmly showed that light is a:Yellow light has a wavelength of about 0.6 of which unit?Maxwell found the speed of electromagnetic waves matched the speed of light. He concluded light is:Your voice bends round a doorway but a hillock returns an echo. The hillock is:Drop a stone in a calm pool. The ring of points all oscillating in phase is a:A point source sends waves out evenly in all directions. Its wavefronts are:By Huygens principle the new wavefront is the common ___ to all the secondary wavelets.Two needles bob in a water trough with a phase difference that never changes. The sources are:Two separate sodium lamps light two pinholes. On the screen you see:The dark and bright bands on the screen in Young's experiment are called:In Young's pattern, consecutive bright fringes are:Near the edge of a shadow you see alternate dark and bright bands. This is:Diffraction is shown by:The rainbow of colours you see on a CD comes from:Wiggle a string up and down and a wave runs along it. The displacement is at right angles to the travel, so thOrdinary lamp light passes through one polaroid. Its intensity drops to:Two polaroids are set crossed. The light passing through both is:Blue sky seen through a rotating polaroid rises and falls in brightness. Sky light is: