A 440-Nm Spectral Line Is Produced by a Transition from an Excited

question 4

Multiple Choice

A 440-nm spectral line is produced by a transition from an excited state to the ground state. The natural line width of the spectral line is 0.020 pm. The average time the atom spends in the excited state is closest to which of the following? ( = 1.055 × 10^-34 J ∙ s = 6.59 × 10^-16 eV ∙ s)

• A) 2.5 × 10^-6 s
• B) 2.5 × 10^-7 s
• C) 2.5 × 10^-8 s
• D) 2.5 × 10^-9 s
• E) 2.5 × 10^-10 s

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Definitions:

LAN

Denotes a network technology designed for connecting computers within a localized setting, such as an office or home, facilitating communication and resource sharing.

MAN

Metropolitan Area Network, a network that covers a larger geographical area than a LAN but smaller than a WAN, often used to connect multiple LANs within a city or metropolitan area.

PAN

stands for Personal Area Network, which is a network for interconnecting devices centered around an individual person's workspace, including computers, phones, and other personal devices.

Deployed

Refers to the act of distributing or stationing something systematically or strategically.