Q.1.
A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism isand the prism is made of a material of refractive index 1.the angle of incidence is
Q.2.
The focal length of a biconvex lens of radii of each surfacecm and refractive index 1.is
Q.3.
Tom’ lenses of focal lengths ±cm and ±cm are available for making a telescope. To produce the largest magnification, the focal length of the eyepiece should be
Q.4.
A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will
Q.5.
The refractive index of the material of an equilateral prism is √What is the angle of minimum deviation?
Q.6.
An astronomical refractive telescope has an objective of focal lengthm and an eyepiece of focal length 2 cm. Then
Q.7.
Two beams of red and violet color are made to pass separately through a prism (angle of the prism is 60°). In the position of minimum deviation, the angle of refraction will be
Q.8.
Which optical instrument is inserted in the body in order to observe internal passages such as a person’s esophagus or intestines?
Q.9.
The image formed by a magnifying glass has a properties of __________.
Q.10.
What is the first image produced by a compound microscope?