Question

In $He-Ne$ laser the most favorable ratio of helium to neon for satisfactory laser action is :

• A. 1 : 4
• B. 4 : 1
• C. 1 : 7
• D. 7 : 1

Answer 1

Answer: (D)

For satisfactory working of $He-Ne$ laser, the ratio of helium to neon is $7:1$ .