This phenomenon is of physical nature.
Penetration of uv radiation is physical change as it happens physically but after penetration it also causes some chemical changes along with physical effects .
Chemical broooooooooooooooo niga
it is a chemical change
Chemical I think
physical as the chemical structure does not change.
A physical change
Physical - there are no chemicals involved
Chemical change
Itβs a physical change π
physical change
It's a physical change why are some people f$#@%ing stupid and saying a chemical change??
Physical change of the paint, not the door.