No, it is not optically active.

Allenes are optically active.

The synthesis of an optically active compound from an optically inactive compound with or without using an optically active reagent.

Not necessarily , the meso form is optically inactive.

The change in speed causes the light to bend. If it is travelling from an optically dencer to an optically rarer medium the ray will bend away from the normal. But if it is travelling from an optically rarer to an optically denser medium then it will bend towards the normal.