Two light emitting sources of wavelength 500 nm are separated by a distance 2.2 x 102 cm. A detector can be moved on the line S1S2 is perpendicular to S1S2 as shown in figure below. The minimum and maximum path difference at the detector as it is moved along the line S1P are (respectively)

Question

Two light emitting sources of wavelength 500 nm are separated by a distance 2.2 x 102 cm. A detector can be moved on the line S1S2 is perpendicular to S1S2 as shown in figure below. The minimum and maximum path difference at the detector as it is moved along the line S1P are (respectively) (A) zero, 2.2× 10-2cm  (B) zero, 1.1× 10-2cm  (C) zero, zero (D)  2.2× 10-2cm,2.2× 10-2cm

Tardigrade Admin · Accepted Answer

The path difference is maximum when the detector is just at the position of S1 and its value is equal to 2.2× 10-2, i.e. the separation between the sources. The path difference is minimum when the detector is at a large distance from S1. In this case path difference is close to zero.

zero, $2.2 \times 10^{- 2} c m$

zero, $1.1 \times 10^{- 2} c m$

zero, zero

$2.2 \times 10^{- 2} c m, 2.2 \times 10^{- 2} c m$

zero, 2.2×10−2cm

zero, 1.1×10−2cm

zero, zero

2.2×10−2cm,2.2×10−2cm

The path difference is maximum when the detector is just at the position of S1​ and its value is equal to 2.2×10−2, i.e. the separation between the sources. The path difference is minimum when the detector is at a large distance from S1​. In this case path difference is close to zero.

zero, $2.2 \times 10^{- 2} c m$

zero, $1.1 \times 10^{- 2} c m$

$2.2 \times 10^{- 2} c m, 2.2 \times 10^{- 2} c m$