EASY
NEET
IMPORTANT
Earn 100

Yellow light is refracted thorough a prism producing minimum deviation. If i1 and i2 denote the angle of incidence and emergence for this prism, then

50% studentsanswered this correctly

Important Questions on Ray Optics and Optical Instruments

MEDIUM
NEET
IMPORTANT
A prism of the refractive index 2 has a refracting angle of 60°. At what angle a ray must be incident on it so that it suffers a minimum deviation?
MEDIUM
NEET
IMPORTANT
At what angle will a ray of light be incident on one face of an equilateral prism, so that the emergent ray may graze the second surface of the prism (μ=2) ?
EASY
NEET
IMPORTANT

A glass prism of refractive index 1.5 is immersed in water of refractive index 4/3. A light ray incident normally on face AB is totally reflected at face AC if

Question Image

MEDIUM
NEET
IMPORTANT
Which of the following phenomenon of light forms a rainbow ?
EASY
NEET
IMPORTANT
A person can see clearly only up to a distance of 25 cm. He wants to read a book placed at a distance of 50 cm. What kind of lens does he require for this purpose and what must be its power ?
MEDIUM
NEET
IMPORTANT
An astronomical telescope has an objective of focal length 100 cm and an eye piece of focal length 5 cm. The final image of a star is seen 25 cm from the eyepiece. The magnifying power of the telescope is
EASY
NEET
IMPORTANT
When a telescope is adjusted for normal vision, the distance of the objective from the eye-piece is found to be 80 cm. The magnifying power of the telescope is 19. What are the focal lengths of the lenses ?
MEDIUM
NEET
IMPORTANT
The focal lengths of the objective and eye lenses of a telescope are respectively 200 cm and 5 cm. The maximum magnifying power of the telescope will be