And the glass on your mobile phone is opaque too? Because it is definitely hidden from you if you cannot see it. But don't despair - all isn't lost! You can

And the glass on your mobile phone is opaque too? Because it is definitely hidden from you if you cannot see it. But don't despair - all isn't lost! You can fix it with sandpaper, after that you'll be able to see the glass and it will become transparent. Please don't sue me if you don't like the result, however.