Home › NEET UG › Physics › Ray Optics and Optical Instruments › A coin lies at the bottom of a tank of water (re…
A coin lies at the bottom of a tank of water (refractive index n_w). To an observer looking from directly above, the coin appears to be:
AAt the same depth as the real depth
BAt an apparent depth = real depth / n_w (i.e., shallower)
CDeeper than the real depth by a factor of n_w
DAt infinity
Answer & Solution
Correct answer: B. At an apparent depth = real depth / n_w (i.e., shallower)
**Apparent depth = real depth / n** (for near-normal viewing). E.g., a coin at the bottom of a 1.33 m deep water tank appears at depth **~1.00 m**. This is why pools look shallower than they actually are.
Related questions
A reflecting telescope of the folded design is named after:A mirror used as a telescope objective is free from aberration that is:A telescope provides angular magnification of objects that are:The objective of a compound microscope forms an image that is:In a compound microscope, the lens nearest the object is the:For much larger magnification, one uses lenses numbering:The maximum magnification of a simple microscope is described as:The near point of the eye is taken as a distance of about: