Exams › JEE Main › Physics
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion (A) : For a simple microscope, the angular size of the object equals the angular size of the image. Reason (R) : Magnification is achieved as the small object can be kept much closer to the eye than 25 cm and hence it subtends a large angle. In the light of the above statements, choose the most appropriate answer from the options given below :
- A is true but R is false
- Both A and R are true but R is NOT the correct explanation of A.
- Both A and R are true and R is the correct explanation of A
- A is false but R is true
Correct answer: Both A and R are true and R is the correct explanation of A
Solution
Both statements are accurate; the assertion correctly describes the relationship between the angular sizes of the object and its image in a simple microscope, while the reason explains how magnification occurs by positioning the object closer to the eye, thereby increasing the angular size.
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 →