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What element produces violet light of approximately 412 nm?

a. hydrogen
b. mercury
c. sodium
d. neon

User VladN
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2 Answers

4 votes

Answer:

a. Hydrogen

Step-by-step explanation:

Emission spectrum of hydrogen produces four main visible wavelengths out of which one is violet light at 412 nm.

Mercury has visible prominent lines of blue, green and yellow-orange.

Sodium has two prominent very close yellow wavelengths in its emission spectrum.

Neon spectra also consists of green to red lines but not violet light.

Thus, correct option is a.

User Harshavardhan
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5 votes
a. Hydrogen

Hydrogen has a line at 410 nm.
Mercury has a line at 405 nm.
Sodium and neon have no lines near 412 nm.
User Aneesh Mohan
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7.1k points