An electron is moving in Bohr's fourth orbit. Its de Broglie wavelength is lambda. What is the circumference of the fourth orbit ?

An electron is moving in Bohr's fourth orbit. Its de Broglie wavelengt

1.	An electron is moving in Bohr's fourth orbit. Its de Broglie wavelength is lambda. What is the circumference of the fourth orbit ?
Answer» `(2)/(LAMBDA)` `2lambda` `4 lambda` `(4)/(lambda)` ANSWER :C