Alerts Wishlist Cart

What is the power of a lens with a focal length of 50 cm?

Practice Questions

Q1
What is the power of a lens with a focal length of 50 cm?
  1. +2 D
  2. +1 D
  3. -2 D
  4. -1 D

Questions & Step-by-Step Solutions

What is the power of a lens with a focal length of 50 cm?
  • Step 1: Understand that the power of a lens is calculated using the formula P = 1/f.
  • Step 2: Note that 'f' is the focal length of the lens, which is given as 50 cm.
  • Step 3: Convert the focal length from centimeters to meters. Since 100 cm = 1 m, 50 cm = 50/100 = 0.5 m.
  • Step 4: Substitute the focal length in meters into the formula: P = 1/0.5.
  • Step 5: Calculate the power: P = 1/0.5 = 2.
  • Step 6: Since the lens is converging, the power is positive, so P = +2 D.
No concepts available.
Biology (School & UG)
Biology (School & UG)
Chemistry (School & UG)
Chemistry (School & UG)
Civil Engineering
Civil Engineering
Commerce & Accountancy
Commerce & Accountancy
Computer Science & IT
Computer Science & IT
Current Affairs & GK
Current Affairs & GK
Data Structures & Algorithms
Data Structures & Algorithms
eBooks
eBooks
Electrical & Electronics Engineering
Electrical & Electronics Engineering
English (School)
English (School)
General Aptitude
General Aptitude
General Knowledge
General Knowledge
General Knowledge & Current Affairs
General Knowledge & Current Affairs
Languages & Literature
Languages & Literature
Law & Legal Studies
Law & Legal Studies
Major Competitive Exams
Major Competitive Exams
Mathematics (School)
Mathematics (School)
Mechanical Engineering
Mechanical Engineering
Medical Science
Medical Science
Physics (School & Undergraduate)
Physics (School & Undergraduate)
Quantitative Aptitude & Reasoning
Quantitative Aptitude & Reasoning
Social Science (School)
Social Science (School)
Technical
Technical
Verbal and Reasoning
Verbal and Reasoning
Vocational & Skill Development
Vocational & Skill Development
Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely