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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEC
Chapter: Structure of Atom

Olympiad workbook · NSEC · Structure of Atom

The power and wavelength emitted by a laser pointer commonly used...

The power and wavelength emitted by a laser pointer commonly used in Power Point presentations are 1.0 mW and 670 nm respectively. Number of photons emitted by this pointer during a presentation of 5 minutes is

Options

A $1.01 \times 10^9$
B $1.01 \times 10^{21}$
C $1.6 \times 10^{16}$
D $1.01 \times 10^{18}$

Correct answer

D. $1.01 \times 10^{18}$

Step-by-step solution

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