Ray Optics and Optical Instruments questions
782 published questions with worked solutions.
- For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the...
- If the focal length of objective lens is increased then magnifying power of
- The refracting angle of a prism is A, and refractive index of the material of the prism is (A/2). The angle of minimum deviation...
- Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with...
- The angle of incidence for a ray of light at a refracting surface of a prism is 45^ . The angle of prism is 60^ . If the ray...
- A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away...
- Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror] Column 1 (A) m =...
- A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is...
- A thin prism having refracting angle 10^ is made of glass of refractive index 1.42. This prism is combined with another thin...
- An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective...
- An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a...
- In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what...
- A concave mirror of focal length 'f' produces an image 'n' time the size of the object. If the image is real, then the distance...
- The focal length of combination of lenses formed with lenses having power of + 2.50D & -3.75D will be
- Two thin lenses have a combined power of +9D. When they are separated by a distance of 20 cm, their equivalent power becomes + 27...
- A plane mirror produces a magnification of
- A convex lens of focal length 'f' produces a real image whose size is 'n' times the size of an object. The distance of the object...
- A convex lens of focal length 'f' m forms a real, inverted image twice in size of the object. The object distance from the lens...
- A ray of light is incident at 60^ on one face of a prism of angle 30^ and the emergent ray makes 30^ with the incident ray. The...
- A convex lens of refractive index 3 2 has a power 2.5. If it is placed in liquid of refractive index 2, the new power of the lens...
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