What value must you use for the focal length f of the lens, Physics

Assignment Help:

Presume that you are asked to find the image position in a problem involving a lens. You are specified the object position and you are told that the lens is a concave lens whose focal point is 12 cm from the plane of the lens. What value must you use for the focal length f of the lens?

Answer:

This is simply a human-established convention. The focal length of the concave (diverging) lens is the negative of the distance from the plane of the lens to the focal point.

If we were discussion about a convex (converging) lens the algebraic sign of the focal length would be positive.


Related Discussions:- What value must you use for the focal length f of the lens

Calculate the entropy change in the universe, A 2kg piece of copper at 200 ...

A 2kg piece of copper at 200 o C is taken out of a furnace and is allowed to cool in air with an ambient temperature of 25 o C. Calculate the entropy change in the universe as a

Optical instrument, difference b/w concave grating and rownald mounting

difference b/w concave grating and rownald mounting

Explain the first law of thermodynamics, Explain the first law of thermodyn...

Explain the first law of thermodynamics. Reduce its mathematical form, give the first law equation for different processes. What are its limitations?

Cadmium rods are provided in a nuclear reactor, Cadmium rods are provided i...

Cadmium rods are provided in a nuclear reactor. Why? Cadmium rods are given in nuclear reactors due to when we begin nuclear reactor then more energy is required for start the

Calculate the frequency of the tuning fork, The end of a pipe is inserted i...

The end of a pipe is inserted into water.  A tuning fork is held over the pipe. If the pipe resonates at lengths of 15 cm and 35 cm, what is the frequency of the tuning for

Bipolar juntion transistors, Im having trouble understanding these,, could ...

Im having trouble understanding these,, could someone explain them in lamens terms

Optics, Michlson interferometer

Michlson interferometer

Explain point charge - electric field, What are the magnitude and the sign ...

What are the magnitude and the sign of a point charge that experiences a force of   0.48 N east when placed in an electric   field of 1.6 x 10 5 N/C west? Normal 0

Correct location of the image formed by a plane mirror, Presumptuous that i...

Presumptuous that it is understood that the object is in front of the mirror and anything on the other side of the mirror is behind the mirror is the following statement sufficient

Ohms law, Ohm's law (G. Ohm; 1827): The ratio of the potential differe...

Ohm's law (G. Ohm; 1827): The ratio of the potential difference among the ends of a conductor to the current passing through it is constant; the constant of proportionality is

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd