Question

How many photons of light of frequency 5 x 10^15 s can provide 5 J of energy?​

Answer 1

Answer:

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Answer 2

Answer:

The number of photons measured is $1.509 \times 10^{18}$.

Explanation:

Given,

The frequency of light, $\nu$ = $5\times 10^{15} s^{-1}$

The energy of light, E = $5J$

The number of photons of light, n =?

As we know,

• According to the equation of energy:
• E = $nh\nu$

Here,

• E = Energy of light
• n = The number of photons of light
• h = Planck's constant
• $\nu$ = Frequency

After putting the given values in the equation, we get:

• $5 = n \times 6.626 \times 10^{-34}\times 5\times 10^{15}$
• n = $1.509 \times 10^{18}$

Hence, the number of photons, n = $1.509 \times 10^{18}$.