What is the difference between focus and principal focus
Question asked by: vinay
Asked on: 28 Sep 2008
Here is the definition of principal focus:
That point where the light rays coming from a distant object converge after passing through a lens, coming to a focus and forming an image
Therefore principal focus is a specific term with a specific definition; focus is just a generic term for accurately rendering light rays.
By: knowitall
Replied at: 05 Oct 2008
Average rating for this answer is 4 / 5
Rate Answer
No comments have been added to this question "What is the difference between focus and principal focus".
Find out more about Physics
Physics Questions and Answers
physics definitions Questions and Answers
Next question: magnets
Become a Member! It's Free >>>
Share on Facebook: 
On Twitter:
Tweet this!
Question Keywords
focus principal difference
More Questions:Heat Transfer Trough Space
Calculate The Speed Of A Car Moving A Distance Of 150km In 3 Hours.
What Is The Speed And Direction Of The Water Current?
In Thrill Machine Rides At Amusement Parks, There Can Be An Acceleration Of 3gram Or More. But Without Head Rests, Acceleration Like This Would Not Be Save. Think Why Not?
A Ball Is Kicked Along The Ground From The Origin And Travels A Distance Of 45.5 M At An Angle Of 11.5ยบ Below The X-axis. How Far Did The Ball Travel In The X-direction?
M.