If a laser light is compose of photons each with an energy of 4.58 × 10−19 j, what is the photon energy of this light in units of nanometers, nm? report your answer with correct significant figures and correct units.

Answer : The photon energy of this light in units of nanometers, (nm) is,

Solution :

Formula used :

where,

E = energy of photon =

h = Planck's constant =

c = speed of light =

= wavelength = ?

Now put all the given values in the above formula, we get:

conversion used :

Therefore, the photon energy of this light in units of nanometers, (nm) is,

sure im new too!

explanation:

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o