The unit of focal length

1.	The unit of focal length
Answer» <P>Answer: dioptre Explanation: t is equal to the reciprocal of the focal length of the device: P = 1/f. HIGH optical POWER CORRESPONDS to SHORT focal length. The SI unit for optical power is the inverse metre (m−1), which is commonly called the dioptre.

Answer»

<P>Answer:

dioptre

Explanation:

t is equal to the reciprocal of the focal length of the device: P = 1/f. HIGH optical POWER CORRESPONDS to SHORT focal length. The SI unit for optical power is the inverse metre (m−1), which is commonly called the dioptre.

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The unit of focal length

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