Home › Bihar Board Class 12 (Science) › Physics › Ray Optics and Optical Instruments › Which medium has the smallest critical angle wit…
Which medium has the smallest critical angle with respect to air?
ADiamond (n = 2.42)
BWater (n = 1.33)
CCrown glass (n = 1.52)
DDense flint (n = 1.62)
Answer & Solution
Correct answer: A. Diamond (n = 2.42)
The critical angle falls as refractive index rises, and diamond (n = 2.42) has the highest index of these, giving about 24 degrees.
Related questions
In the Cartesian convention, heights above the principal axis are taken as:The refractive index of a pair of media depends on the:A glass lens sits in a liquid of the same refractive index. It then acts like:An equiconvex lens of glass (n = 1.5) has surfaces of radius 30 cm. Its focal length is:A diverging lens of f = -20 cm is 20 cm from an object. Rays appear to diverge from:A convex lens has f = 12 cm and an object is 18 cm away. The magnification is:For an object 10 cm from a concave mirror of radius 40 cm, reflected light seems to come fA concave mirror has f = -15 cm and an object stands 30 cm away. Reflected rays meet at: