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Yes, rays that are parallel and close to the principal axis are known as paraxial rays. These rays are used in geometrical optics to simplify calculations and analyses of optical systems.

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Why mirror formula is valid only for small apertures?

The mirror formula, ( \frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i} ), is valid only for small apertures because it assumes paraxial rays (rays close to the optical axis). For large apertures, the non-paraxial rays behave differently and the simple mirror formula may not accurately predict the image location.


What is the force between two infinite, parallel wires carrying current when they are placed in close proximity to each other?

The force between two infinite, parallel wires carrying current when placed close to each other is known as the magnetic force. This force is attractive or repulsive depending on the direction of the currents in the wires.


What happens when two wires with parallel current are placed in close proximity to each other?

When two wires with parallel currents are placed close to each other, they can create a magnetic field that interacts with each other. This interaction can cause the wires to either attract or repel each other, depending on the direction of the currents. This phenomenon is known as the Ampre's force law.


What is it called when two measurements are close to each other?

When two measurements are close to each other, it is called precision. It indicates the level of consistency and repeatability in a set of measurements.


What is it called when sound particles are close together?

When sound particles are close together, it is called compression. This occurs during the peaks of a sound wave, where air molecules are densely packed together.

Related Questions

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they are called the parallel bars


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You would get into trouble. No school principal would allow you to get that close. It is illegal.


Why mirror formula is valid only for small apertures?

The mirror formula, ( \frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i} ), is valid only for small apertures because it assumes paraxial rays (rays close to the optical axis). For large apertures, the non-paraxial rays behave differently and the simple mirror formula may not accurately predict the image location.


Where is division of north Korea and south Korea?

The 38th Parallel. Rather close to the South Korean city of Janggok


What is a democratic principal?

majority rules; now matter how close of a margin or the views of the opposition.


To close school the principal calls six teachers who in turn call six more if each of those teachers call six more how amny calls will be made by the teachers in this last group?

If the principal called 6 teacher and those teachers called 6 more teachers that would be 24 teacher in total. This is considered a math problem.


Parallel sides never meet because?

they dont come close enough to each other.


What are synonyms of the word alike?

same similar, close, parallel, resembling, identical, corresponding, akin


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It allows the driver to see how close they are to a vehicle or how close to the curb they are when they are parallel parking.


Bring close to boil is called what?

When you bring something close to boiling, it is called scalding it (or to "scald").


What is a close meaningful relationship between you and an individual called?

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When you close a CD at maturity and withdraw the funds i understand that you have to pay taxes on the interest but do you have to pay income taxes on the principal amount?

No not on the principal amount. The funds that were used to purchased the CD originally had already been subject to income taxes.