Calculate the energy of a photon of wavelength 11.56 meters. (planck’s constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)

Answer : The energy of a photon is,

Explanation :

Formula used :

where,

E = energy = ?

h = Planck's constant =

c = speed of light =

= wavelength = 11.56 m

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

Therefore, the energy of a photon is,

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).