Exams › JEE Main › Physics
Five persons P1, P2, P3, P4 and P5 recorded object distance (u) and image distance (v) using same convex lens having power +5 D as (25, 96), (30, 62), (35, 37), (45, 35) and (50, 32) respectively. Identify correct statement (1) Readings recorded by all persons are correct (2) Readings recorded by P3 persons are incorrect (3) Reading recorded by P3 and P2 persons are incorrect (4) Reading recorded by P4 and P5 persons are incorrect
- (1) Readings recorded by all persons are correct
- (2) Readings recorded by P3 persons are incorrect
- (3) Reading recorded by P3 and P2 persons are incorrect
- (4) Reading recorded by P4 and P5 persons are incorrect
Correct answer: (2) Readings recorded by P3 persons are incorrect
Solution
The readings for P3 are incorrect because they do not satisfy the lens formula (1/f = 1/v - 1/u) given the power of the lens. The calculated image distance for the object distance recorded by P3 does not align with the expected values based on the lens's power.
Related JEE Main Physics questions
- A telescope is fitted with an objective lens of focal length 100 cm and an eyepiece of focal length 5 cm. If the final image is adjusted to form at the least distance of distinct vision, what is the telescope’s magnifying power?
- An object placed 2.4 m in front of a lens produces a clear image on a film located 12 cm behind the lens. A 1 cm thick glass slab of refractive index 1.50 is then inserted between the lens and the film, with its plane surfaces parallel to the film. To obtain a sharp image again on the film, to what distance from the lens must the object be moved?
- A light ray is incident on an equilateral prism in such a way that the angle of incidence equals the angle of emergence, and this common angle is three-fourths of the prism angle. What is the angle of deviation produced?
- A plane mirror is placed flat on the ground, 60 m away from the base of a tower. From the eye, the top of the tower and its image formed in the mirror are seen under a right angle. What is the height of the tower?
- A glass lens with refractive index 1.60 has a focal length of +20 cm when placed in air. If the same lens is immersed in water of refractive index 1.33, its focal length will be
- A prism is placed in air. If a ray is incident at 60°, and the prism angle, the deviation angle \(\delta\), and the angle of emergence \(e\) are all equal, what is the refractive index of the prism?
⚔️ Practice JEE Main Physics free + battle 1v1 →