CBSE Class 12 Ray Optics and Optical Instruments — practice questions
14 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Ray Optics and Optical Instruments in the app →Snell's law of refraction at the boundary between two media of refractive indices $n_1$ and $n_2$ statesThe CRITICAL ANGLE for total internal reflection at the boundary between a denser medium (refractive index $n$The relationship between the focal length $f$ and the radius of curvature $R$ for a SPHERICAL MIRROR isUsing the standard sign convention (light travels left to right, distances measured from pole, +ve to right), An object is placed at $30\,\text{cm}$ in front of a concave mirror of focal length $20\,\text{cm}$. The imageThe LENSMAKER'S formula for a thin lens of refractive index $n$ (in air) with radii of curvature $R_1$ and $R_The 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 combOptical fibres use TOTAL INTERNAL REFLECTION to transmit light over long distances. The MAIN condition for theA converging lens of focal length $20\,\text{cm}$ produces a real image at $30\,\text{cm}$ from the lens. The Light passing through a PRISM is dispersed because different colours of light haveWhen 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 actu