AP EAPCET (Engineering) Wave Optics — practice questions
80 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP EAPCET (Engineering) Wave Optics in the app →Two light sources can produce sustained interference fringes on a screen only if they are:**Huygens' principle** states that every point on a wavefront acts as a:Which of the following phenomena conclusively proves that **light is a transverse wave**?When light passes from one medium to another, which property remains **unchanged**?The **wavelength** of light of wavelength 600 nm in air becomes (in water, n = 1.33) approximately:When unpolarized light passes through a single ideal polarizer, the transmitted intensity is:**Malus' law** gives the transmitted intensity through a second polarizer as:In Young's double-slit experiment, the fringe width $w$ is given by:In Young's experiment, if the entire setup is immersed in a medium of refractive index $n$, the fringe width:Two slits 0.5 mm apart are illuminated with light of 600 nm. The fringes are observed on a screen 1 m away. ThLight of intensity $I_0$ passes through two polarizers whose axes make 60° with each other. The transmitted inBrewster's angle for light going from air (n=1) to glass (n=1.5) is approximately:In a single-slit Fraunhofer diffraction pattern, the first minimum occurs at angle $\theta$ satisfying:A telescope objective has diameter 2.5 m. Its angular resolution at $\lambda = 5500$ Å is approximately:White light (400–700 nm) passes through a glass of refractive index 1.55. The wavelength range observed in theThe optical path of a 3 cm ray in flint glass (n = 1.6) equals that of an unknown medium (n = 1.25) over distaLight enters a glass slab (n = 1.5) at angle i = 30°. The angle of refraction r inside glass is approximately:For two equal-amplitude coherent sources, the maximum and minimum intensities are:Two crossed polaroids transmit light of intensity:The refractive index of glass is 1.5. The speed of light in glass is:Snell's law states that the ratio sin(i)/sin(r) for two media is:The wavefront from a point source is:Young's double-slit experiment demonstrates which phenomenon?Two waves with the same frequency and constant phase difference are called:In Young's double-slit experiment, the bright fringe condition is path difference equals:Polarization of light is possible because light is:In Young's experiment, fringe width β equals:In Young's experiment with d = 1 mm, D = 1 m, light wavelength 600 nm, fringe width is:When light goes from a less dense to denser medium (e.g., air to water), it bends:Critical angle for total internal reflection from water (n = 4/3) to air:In a thin film of thickness t with refractive index n, condition for destructive interference for reflected liDiffraction is the:Single-slit diffraction first minimum occurs at angle θ where:Brewster's angle θ_B for light hitting glass (n = 1.5) from air satisfies:For maximum brightness in Newton's rings (reflected light, air film), what is the radius of n-th bright ring? Two slits 0.5 mm apart with light of wavelength 5000 Å. The 5th bright fringe is at distance from central maxiIn Young's experiment, if the entire setup is immersed in water (n = 4/3), the fringe width:Power of a convex lens of focal length 50 cm:Resolution limit of a telescope by Rayleigh criterion:Wavelength of light in water (n = 4/3) if its vacuum wavelength is 600 nm:Two coherent sources have intensities I1 = 9I and I2 = I. Maximum and minimum intensities in interference pattIn Young's experiment, intensity at a point where path difference is λ/4:For a grating with 500 lines/mm and light at 600 nm, find angle for the first-order maximum:In single-slit diffraction, ratio of intensities of first and central maxima is approximately:Speed of light in a medium of refractive index 1.5 is:A wavefront is:Young's double-slit experiment demonstrates:For constructive interference, path difference Δp =In YDSE, fringe width β =Coherent sources have:In YDSE with λ = 600 nm, d = 0.2 mm, D = 1 m, fringe width =Diffraction is:Single-slit diffraction first minimum at angle θ satisfies:Polarization establishes that light is:Brewster's law: angle of polarization i_B from glass-air interface satisfies:Maximum number of bright fringes visible in YDSE with d/λ = 4:Speed of light in a medium of refractive index n =Resolving power of a microscope is proportional to:In YDSE with monochromatic light (λ = 500 nm) and d = 0.1 mm, distance from central maximum to 3rd bright frinIn YDSE, when whole apparatus is immersed in water (n = 4/3), fringe width:Intensity at point in YDSE with phase difference φ between two waves of equal amplitude:For single-slit diffraction of width a, angular position of m-th minimum:Resolving power of diffraction grating with N lines:Width of central maximum in single-slit diffraction:Light from a sodium lamp (λ = 590 nm) falls on YDSE with d = 0.5 mm, screen D = 1 m. Fringe width:Two slits separated by d emit light of wavelength λ. Angular separation of fringes:Resolving power of telescope is given by Rayleigh criterion:Who put forward the wave theory of light in 1678?Who gave the corpuscular model of light in 1637 and derived Snell's law?On bending towards the normal, the corpuscular model gave what speed?What did Foucault find in 1850 about the speed of light in water?Which theory explained how light waves travel through vacuum?The branch of optics that neglects the finite wavelength of light is?In Huygens' construction, the new wavefront is the common tangent to what?How did Huygens explain the absence of a backwave?Speed of wave is v. After time t, each secondary wavelet has radius?Light of 589 nm in air enters water of index 1.33. Wavelength there?Air to water for 589 nm light: its frequency (c = 3×10⁸ m/s) is?Two coherent sources, each giving I0, differ in phase by π/2. Net intensity?Third bright fringe: λ = 500 nm, D = 2 m, d = 1 mm. Distance from centre?