The lewis dot structure for water shown above how many bonded pair electron groups?

number of bond pair electron = 2

Explanation:

from the diagram it is clearly that there are only two bond which is bonded with two different hydrogen and one bond contain two electrons that is one pair of electron

hence total bondcpair electron=2

533.33 nm

Explanation:

Since dsinθ = mλ  for each slit, where m = order of slit and λ = wavelength of light. Let m' = 10 th order fringe of the first slit of wavelength of light, λ = 640 nm and m"= 12 th order fringe of the second slight of wavelength of light, λ'.

Since the fringes coincide,

m'λ = m"λ'

λ' = m'λ/m"

= 10 × 640 nm/12

= 6400 nm/12

= 533.33 nm