# Double-slit experiment and an experimental laboratory without photons

In order to see interference pattern of an electron, after the shot, an electron must not interact with any photon. So I'm asking how can such an photonless area can be created in the universe?

And If I, myself enter that area, will I be acted like a wave, will I be dead?

What matters is that the energy of the photons must be much less than the energy of the electron. In that case the photon cannot disturb the electron enough to spoil the diffraction pattern. In a typical electron diffraction experiment the electron energy will be around 1 to 10 keV, and the energy of visible light photons is around 1 eV. So the electron energy is $10^3$ to $10^4$ times greater than the energy of the light. That's why visible light doesn't spoil the diffraction pattern. If we started shining X-rays at our experiment that would be a different matter. At those energies we'd expect to get substantial Compton scattering and our diffraction pattern would be affected.