NEET UG Wave Optics — practice questions
63 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Wave Optics in the app →A wavefront in optics is best described as:According to Huygens' principle:Light enters a glass slab (n = 1.5) at angle i = 30°. The angle of refraction r inside glass is approximately:In Young's double-slit experiment, **incoherent** sources (rapidly varying phase difference) give:Two sources are said to be coherent if:For two equal-amplitude coherent sources, the maximum and minimum intensities are:A slit of width 1 × 10⁻⁵ m is illuminated by light of wavelength 500 nm. The angular position of the first minWhich is the KEY physical difference between interference and diffraction?When unpolarised light of intensity I₀ passes through a single polaroid:Malus' law states that when **linearly polarised** light of intensity I₀ passes through a polaroid whose pass-A third polaroid is inserted between two crossed polaroids (90° apart). If the middle polaroid's pass-axis is Two crossed polaroids transmit light of intensity:The refractive index of glass is 1.5. The speed of light in glass is: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:In Young's double-slit experiment, the fringe width β is given byIn a double-slit experiment, if the wavelength is doubled and the slit separation is halved, the fringe width At a point where the path difference between two coherent light waves is 3λ/2, the interference isThe principle of superposition of waves states that at a pointThe Huygens principle states that every point of a wavefront acts asTwo coherent sources produce interference fringes. If the intensities of individual sources are I₁ = 4I₀ and IFor diffraction at a single slit of width a, the angular position of the first minimum is given byThe width of the central maximum in single-slit diffraction on a screen at distance D isThe polarising angle (Brewster angle) for glass of refractive index 1.5 isWhich of the following phenomena is characteristic ONLY of transverse waves and NOT of longitudinal waves?An unpolarised light of intensity I₀ passes through a polariser. The transmitted intensity isIf polarised light of intensity I passes through a polariser whose axis makes angle θ with the polarisation diCoherent sources are those that emit waves ofIn a Young's double-slit experiment, a thin transparent sheet of thickness t and refractive index n is placed Newton originally supported the corpuscular theory of light. The wave theory was strongly established byIn 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: