Question

In a Frensnel biprism experiment the two positions of lens give separation between the slits as 16cm and 9cm respectively. The actual distance of separation is:

• A. 12 cm
• B. 12.5 cm
• C. 13 cm
• D. 14 cm

Answer 1

Answer: (A)

12 cm

Answer 2

In freshnel biprism experiment the actual distance of separation between the two slits,

$d = \sqrt{d_{1}d_{2}} = \sqrt{16 \times 9} = 12cm$