EASY
NEET
IMPORTANT
Earn 100

For a concave mirror, paraxial rays are focused at distance R2 from pole and marginal rays are focused at distance x from pole, then (R is radius of curvature)

50% studentsanswered this correctly

Important Questions on Ray Optics and Optical Instruments

MEDIUM
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 6
Find the nature of image when an object is placed at 2f from the pole of a convex mirror of focal length f
EASY
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 7
A convergent beam is an incident on the concave mirror, what will be the nature of the image?
EASY
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 8
An object is at 20 cm from a concave mirror of focal length 10 cm, the nature of image is
MEDIUM
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 9
A ray of light takes 10-9 second to cross a glass slab of refractive index 1.5. The thickness of the slab will be
EASY
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 10
The time taken by a monochromatic light to travel a certain distance in air in 9×10-6 seconds. The time taken by the light ray to travel the same distance in water of refractive index 43 is
EASY
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 11
A monochromatic light passes through a glass slab μ=32 of thickness 90 cm in time t1. If it takes a time t2 to travel the same distance through water μ=43. The value of t1-t2 is
EASY
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 12
A beam of light is partially reflected and partially refracted from a surface. The angle between reflected and refracted light ray is 90°. If the angle of refraction is 30°, the angle of incidence is
HARD
NEET
IMPORTANT
Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 13
A small object is placed 20 cm in front of a block of glass 10 cm thick and its farther side silvered. The image is formed 22 cm behind the silvered face. Find the refractive index of glass.