Question

The wavelength of a spectral line is 480 nm. What is
its value in mm?
(a) 480 x 10^-7 mm (b) 48 x 10^-5 mm
(c) 48 x 10^-6 mm (d) 4.8 x 10^-5 mm​

Answer 1

Answer:

b)  48 x 10^-5 mm

Explanation:

480nm= 480 *10^-9 m

          = 480  *10^-9 mm/m.....................multipying and dividing by mili i.e. m

          =(480*10^-9)/(1*10^-3) mm...............putting value of m in denumerator

          = 480*10^-6 mm

           =48*10^-5 mm

Answer 2

Answer:

48×10^-5mm

Explanation:

480×10^-9m

480×10^-9×10^3mm(10^3 by m value above)

hope this helps u

ans is this only