| ⇦ | 
| ⇨ |
Calculate the focal length of a reading glass of a person, if the distance of distinct vision is 75 cm
Options
(a) 75.2 cm
(b) 25.6 cm
(c) 100.4 cm
(d) 37.5 cm
Correct Answer:
37.5 cm
Explanation:
Given: v = -75 cm and u = -25 cm
We know that, lens formula, we have 1/f = (1/v) – (1/u) ⇒ (1/f) = (-175) + (1/25) 1/f
= (1/25) – (1/75) = (3 – 1) / 75 = 2 / 75
Focal length of a glass, f = 75 / 2 = 37.5 cm
Related Questions: - A transformer rated at 10 kW is used to connect a 5 kV transmission line to a 240 V
- Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state
- The displacement of particle is given by x=aₒ+(a₁t/2)-(a₂t²/3) what is acceleration?
- Work of 3.0×10⁻⁴ joule is required to be done in increasing the size of a soap film
- A nucleus ᴢXᴬ emits an α- particle with velocity v. The recoil speed of the daughter
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A transformer rated at 10 kW is used to connect a 5 kV transmission line to a 240 V
- Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state
- The displacement of particle is given by x=aₒ+(a₁t/2)-(a₂t²/3) what is acceleration?
- Work of 3.0×10⁻⁴ joule is required to be done in increasing the size of a soap film
- A nucleus ᴢXᴬ emits an α- particle with velocity v. The recoil speed of the daughter
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply