Plzz answer question no 16 Airhas tefmctive index I .0003. The thickness ofair column,
which mll have one morewavelength of yellow light (6000
A) than in same thickness of vacuum, is
(a) 2 mm
. (c) 2m
(b) 2 cm
2,
(d) 2 km
16.
A glass slab of thickness 8 cm contain, the same number
of waves as 10 cm of water when both are traversed by the
same monochromic light. Ifthe refractive index of water iS
4/3, the refractive index of glass is
(c) 16/15
Snells Law
(b) 5/4
(d) 3/2
25
17. A beam of monochromatic blue light of wavelength 420
nm in air travels in water (g = 4/3). Its wavelength in
