In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of `3.15xx10^(-18)J` from the radiations of `600 nm`, calculate the number of photons received by the detector.

Explanation

To calculate the number of photons received by the detector, we will follow these steps:

### Step 1: Calculate the energy of one photon

The energy of a photon can be calculated using the formula:

\[
E = \frac{hc}{\lambda}
...