TS EAMCET Wave Optics — practice questions
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According to Huygens' principle, every poinTwo light sources can produce sustained interference fringes on a screen only if they are:In Young's double-slit experiment, fringe width $\beta = \dfrac{\lambda D}{d}$. If the screen distance $D$ is In Young's double-slit experiment, monochromatic light of wavelength $600$ nm is used. The slit separation is 
Unpolarised light strikes a glass surface aMonochromatic light of wavelength $\lambda$ passes through a single slit of width $a$. The angular position $\**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:**Brewster's angle** $\theta_B$ is the angle of incidence at which:Two sources are said to be **coherent** if they:In Young's double-slit experiment, fringes form when: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:The condition for **constructive interference** at a point in Young's double-slit experiment is that the path Light from a source passes through two polarizers whose axes are perpendicular (crossed). The intensity after In a single-slit Fraunhofer diffraction pattern, the first minimum occurs at angle $\theta$ satisfying:**Interference** differs from **diffraction** in that interference involves:Light of wavelength 500 nm is incident on a single slit of width 0.2 mm. The angular position of the first difThe **Rayleigh criterion** for the resolution of two point sources by a telescope states that two sources are A telescope objective has diameter 2.5 m. Its angular resolution at $\lambda = 5500$ Å is approximately:In Young's double-slit experiment, the intensities of the two coherent sources are in the ratio $4:1$. The ratUnpolarized light of intensity $I_0$ passes through three polarizers in succession. The axis of the second makA double-slit arrangement gives fringes 0.20° apart for sodium light ($\lambda = 589$ nm). If the whole setup In a single-slit diffraction setup, slit width 0.2 mm, screen distance 2 m. First minimum is observed at 5 mm White light (400–700 nm) passes through a glass of refractive index 1.55. The wavelength range observed in theA telescope mirror with diameter $D = 200$ inches observes a star emitting $\lambda = 5000$ Å. Its angular limTwo polaroids are kept with their polarising axes parallel; the transmitted intensity is $I$. One polaroid is The optical path of a 3 cm ray in flint glass (n = 1.6) equals that of an unknown medium (n = 1.25) over distaA 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: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:Why don't we see interference between two different light bulbs?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:For a thin film (refractive index 1.4, thickness 250 nm), which visible wavelength shows constructive interferFor a thin film (e.g., soap bubble) of refractive index 1.4 and thickness 250 nm, what wavelengths in visible In a meter bridge experiment, when wavelength changes from 600 nm to 400 nm, the fringe width: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: