You Do Need power plug adapter while traveling from Poland to Laos.

Here is Why You Need An Adapter

The outlet and plug type used in Laos are A, B, C, E and F and in Poland are C and E. This is how they look like.

Poland

In Poland, outlets of type C and E are in use.

Type C

Type E

Laos

In Laos, outlets of type A, B, C, E and F are in use.

Type A

Type B

Type C

Type E

Type F