Home › Bihar Board Class 12 (Science) › Physics › Ray Optics and Optical Instruments › A tank is 12 cm deep with water (n = 4/3). Seen …
A tank is 12 cm deep with water (n = 4/3). Seen from directly above, the bottom appears at a depth of:
A16 cm
B9 cm
C12 cm
D6 cm
Answer & Solution
Correct answer: B. 9 cm
Apparent depth equals real depth divided by refractive index, so 12 / (4/3) = 9 cm.
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: