Whats the diff between light energy and light frequency?

Question

So im learning about light frequencies in chem and I was just wondering what the diff was??
and what color of light has the highest energy and frequency??
Thanks! :)

Answer 1

The energy of a photon is given as a function of its frequency f

E = hf

h is Planck's constant = 6.626x10^-34 J.s

So the higher the frequency, the higher the energy.

The highest visible light frequency is 7.5x10^14 s^-1 (Hz).

so the highest energy of one photon of the highest frequency of visible light (pant pant...) is

4.9695 x 10^-19 Joules

Answer 2

Light energy and light frequency (specifically of the photons) are related by :

E = h nu,

where E is the energy, nu the frequency, and h is Planck's constant. Planck postulated this relationship at the start of the 20th century, when he was trying to understand the spectrum of so-called "black body radiation." (A "black body" is an idealized object that absorbs and re-radiates at all frequencies.)

In the traditional optical spectrum :

Red, orange, yellow, green, blue, indigo, violet,

it would be the photons of violet radiation that would have the highest energy and frequency. However, the spectrum doesn't stop there. Ultra-violet, x-rays, gamma rays, etc all have increasingly greater energies and frequencies, ultimately of lethal strength! Similarly, at lower frequencies than red there is infrared and so on. The full spectrum in which physicists and astronomers now explore the Universe extends extremely far to either side of the range that we can actually see with our eyes. For obvious evolutionary reasons, we are senstive to radiation close to the peak of the sun's own spectrum, in the yellow-green region. If we hadn't have developed our eyes to use the most available frequencies coming from the Sun, other predators who did so would have been able to catch and deal with us very easily!

Live long and prosper.

Answer 3

Light frequency is the specific vibrational number that also specifies the color. Shorter wave lengths have higher frequency so Blue and UV have higher frequency than Red and IR. The energy in the photons goes up with frequency.