Question

Air has refractive index of 1.0003. The thickness of air column, which will have one more wavelength of yellow light (6000 Å) then in the same thickness of vacuum is –

• A. 2mm
• B. 2 cm
• C. 2m
• D. 0.2 mm

Answer 1

Answer: (A)

2mm

Answer 2

d = $\frac { \lambda } { \mu - 1 }$ = $\frac { 600 \times 10 ^ { - 10 } } { .0003 }$ m

\ d = 2mm