Why no electron is emitted from a wooden table when light from a bulb falls on it?

When an electron jumps from L to K shell -

Why does an opaque body form shadow when light falls on it ?

A metal has work function 5eV. Will this metal emit electrons, when light of wavelength 400 nm falls on it?

Blue light can eject electrons from a photo sensitive surface while orange light can not. Will violet and red light eject electrons from the metal surface?

Why does a passenger fall forward when he alights from the moving bus ?