Question

How many nodal lines are created by two point sources emitting at the same wavelength λλ that are separated by a distance equal to 4.5λ4.5λ? Express your answer as an integer.

Answer 1

Answer:

The number is  $N = 18$

Explanation:

From the question we are told that

   The distance of separation is  d =  4.5λ

Generally equation for nodal lines for two pint source is mathematically represented as

     $N = \frac{ 2 * m * d }{\lambda }$

Here  m  is  2  represented number of point source

      $N = \frac{ 2 * 2 * 4.5\lambda }{\lambda }$

=>  $N = \frac{ 2 * 2 * 4.5\lambda }{\lambda }$

=>  $N = 18$