Add `6.75 xx 10^3 cm to 4.52 xx 10^2` cm

The wave emtted by any atom or molecule must have some finite total length .For sodium light this length(called coherne length)is 2.4 cm.Deduce the cohernece time.Given that gamma=5*9 xx 10^(-7) cm and c=3.0 xx 10^8 m s^(-1) .

Calculate momentum of photon. Frequency associated with the photon is 5 xx 10^(13) Hz. Given h6.6 xx 10^(-34) Js and c=3 xx 10^(8) ms^(-1)

Calculate momentum of photon. Frequency associated with the photon is 1.5 xx 10^(13) Hz. Given h6.6 xx 10^(-34) Js and c=3 xx 10^(8) ms^(-1)

A solution of sodium chloride discharges 6.1 xx 10^16Na^+ ions and 4.6 xx 10^6 Cl^- ions in 2s. Find the current passing through the solution.

The procedure in was repeated for three further oil droplets. The magnitude of the charge on each of the droplets was found to be 3.2 xx 10^-19C, 6.4 xx 10^-19C and 3.2 xx 10^-19C . Explain what value these data and your answer in would guggest for the charge on the electron.

A 0.50g sample of rock was found to have 2.5 xx 10^(-6) mol of ._(19)^(40)K (t_(1//2)=1.3 xx 10^(9) "yr") and 7.5 xx 10^(-6) mol of ._(20)^(40)Ca . How old is the rock?