What are the units of a photometer?

Answer 1

There are many different unit that could be used but the most common is #"Photons"/(cm^2)# or, which is the same thing, #"Photons".cm^-2#

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Answer 2

When a photometer measures illuminance, or the amount of light falling on a surface, its units are usually expressed in terms of lux (lx) or foot-candles (fc).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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