Frequency Transparency

[kdm06d]

I was wondering if someone could give me a formula/explanation in how to find out if a given frequency will travel through an object or some sort...

I believe higher as well as longer wavelengths have better chances of going through something than the reverse. Any ideas??

What information would you need from the object? Index of Refraction??

[mgb_phys]

It depends on the materialand frequency.

For visible/infrared light and a transparent material you can work out the absorption frequncies from the bonds.

For microwave/radio you can work out an approximation from the conductivity and material thickness.