Consider two radiations of wavelengths 1. $\lambda_1 = 2000$ Å 2. $\lambda_2 = 6000$ Å The ratio of the energies of these two radiations $\left(\dfrac{E_1}{E_2}\right)$ is ________ (Nearest integer).

JEE Main 2026 — Chemistry Physical Chemistry

2026integereasy

Consider two radiations of wavelengths

$\lambda_1 = 2000$ Å
$\lambda_2 = 6000$ Å

The ratio of the energies of these two radiations $\left(\dfrac{E_1}{E_2}\right)$ is ________ (Nearest integer).

Official previous-year question

Held on 8 Apr 2026 · Verified 6 Jul 2026.

Did you get this right?

Solution

The energy of a photon is given by the relation:

$E = \dfrac{hc}{\lambda}$

For the two radiations, the energies are $E_1 = \dfrac{hc}{\lambda_1}$ and $E_2 = \dfrac{hc}{\lambda_2}$ .

The ratio of their energies is:

$\dfrac{E_1}{E_2} = \dfrac{\lambda_2}{\lambda_1}$

Substituting the given values $\lambda_1 = 2000$ and $\lambda_2 = 6000$ :

$\dfrac{E_1}{E_2} = \dfrac{6000}{2000} = 3$

Answer: $3$

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JEE Main 2026 — Chemistry Physical Chemistry

2026integereasy

Consider two radiations of wavelengths

$\lambda_1 = 2000$ Å
$\lambda_2 = 6000$ Å

The ratio of the energies of these two radiations $\left(\dfrac{E_1}{E_2}\right)$ is ________ (Nearest integer).

Official previous-year question

Held on 8 Apr 2026 · Verified 6 Jul 2026.

Did you get this right?

Solution

The energy of a photon is given by the relation:

$E = \dfrac{hc}{\lambda}$

For the two radiations, the energies are $E_1 = \dfrac{hc}{\lambda_1}$ and $E_2 = \dfrac{hc}{\lambda_2}$ .

The ratio of their energies is:

$\dfrac{E_1}{E_2} = \dfrac{\lambda_2}{\lambda_1}$

Substituting the given values $\lambda_1 = 2000$ and $\lambda_2 = 6000$ :

$\dfrac{E_1}{E_2} = \dfrac{6000}{2000} = 3$

Answer: $3$

Your note

JEE Main Physical Chemistry in other years

Keep practicing Physical Chemistry

Work through every JEE Main Physical Chemistry PYQ, year by year.

Browse all Chemistry topics

JEE Main 2026 — Chemistry Physical Chemistry

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

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JEE Main 2026 — Chemistry Physical Chemistry

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry