Available light emitting region in light emitting diode

Q.  In light emitting diode, the available light emitting region is
- Published on 10 Nov 15

a. Less than 2.5 mm
b. From 2.5 to 25 mm
c. Greater than 25 mm
d. Greater than 50 mm

ANSWER: From 2.5 to 25 mm

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