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Chapter 4: Problem 27

One lumen = ______ candle power. (1) \(10.76\) (2) \(12.56\) (3) 700 (4) None of these

Short Answer

Expert verified
Answer: One lumen is approximately equal to 12.56 candle power.

Step by step solution

01

Understand the units

Lumen (lm) is the SI unit of luminous flux, which is a measure of the visible light emitted by a light source. Candle power (cp) is an outdated unit of luminous intensity, which measures the intensity of light in a particular direction.
02

Identify the conversion factor

The conversion factor between lumens and candle power is given by the relation: 1 cp = 12.57 lumens (approximately).
03

Compare the options to the conversion factor

From the given options, we can see that option (2) is closest to the actual conversion factor (12.57). Therefore, we can choose option (2) as the correct answer.
04

Final Answer

One lumen is approximately equal to 12.56 candle power (option 2).

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