question_answer

A beam of 450 nm light is incident on a metal having work function 2 eV and placed in a magnetic field B. If the most energetic electrons emitted are bent into circular arc of radius 0.2 m, find 6.

A)  \[2.36\text{ }\times \text{ }{{10}^{-4}}\text{ }T~\]

B)  \[1.46\text{ }\times \text{ }{{10}^{-5}}\text{ }T\]  

C)  \[6.9\text{ }\times \text{ }{{10}^{-5}}\text{ }T\]

D)  \[9.2\text{ }\times \text{ }{{10}^{-6}}\text{ }T\]