There are materials which absorb photon of shorter wavelength and emit photons of longer wavelength. Can there be stable substances which absorb photons of larger wavelength and emit light of shorter wavelength.

Explanation

To determine whether there can be stable substances that absorb photons of larger wavelengths and emit light of shorter wavelengths, we need to analyze the relationship between photon energy and wavelength.

### Step-by-Step Solution:

1. **Understanding Photon Energy**:
- The energy of a photon is given by the equation:
\[
E = \frac{hc}{\lambda}
...