Bihar Board Class 12 (Science) Ray Optics — practice questions
19 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Bihar Board Class 12 (Science) Ray Optics in the app →Snell's law of refraction at the boundary between two media of refractive indices $n_1$ and $n_2$ statesThe relationship between the focal length $f$ and the radius of curvature $R$ for a SPHERICAL MIRROR isThe POWER of a lens (in diopters, D) is defined asTwo thin lenses of powers $+5\,\text{D}$ and $-3\,\text{D}$ are placed in CONTACT. The total power of the combA converging lens of focal length $20\,\text{cm}$ produces a real image at $30\,\text{cm}$ from the lens. The When light travels from one medium to another, which property of the wave REMAINS UNCHANGED?An object is placed at the FOCUS of a concave mirror ($u = f$, both negative). The image forms atThe phenomenon by which the apparent position of a star near the horizon appears slightly higher than its actuThe mirror equation relates u, v and f asThe power P of a lens of focal length f (in metres) is given byAn object is placed 30 cm from a concave mirror of focal length 20 cm. The image distance isRefractive index of water with respect to air is 4/3. The critical angle for a water–air interface is approximA convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 25 cm. The power Light passes from air (n=1) into glass (n=1.5) at an incidence angle of 60°. Using Snell's law, the angle of rFor a thin prism of small refracting angle A and refractive index n, the deviation δ is approximatelyAn astronomical telescope in normal adjustment has an objective of focal length 100 cm and an eyepiece of focaThe apparent depth of an object lying at the bottom of a pool of water (n = 4/3) is, in terms of its real deptA thin prism of refracting angle 5° is made of glass with n = 1.5. The deviation δ of a light ray passing throTwo thin convex lenses, each of focal length 20 cm, are placed coaxially 10 cm apart in air. The equivalent fo