at the beginning of the game, the knight is generally stronger, as it can hop around pieces easily and freely s if on an open board. The bishop at the beginning is generally weak, as it it restricted by pawns, and has little room to move.
Towards the end of the game, the knight looses its power. It threatens less squares (as there are less possible threats) and has little chance of smothered checkmate. The bishop however increases power, because more of the squares are free, and ready for the bishop to move to.
Rememer that a pair of bishops are worth alot more then a bishop and a knight. In some books bishops and knights are marked as 3 points, and in others 3.25 and 3.5. Sometimes however you must look at your surroundings and look at what is more useful. Maybe your bishop is at where it started, whilst your knight occupys the centre, in these situations positition is normally better then power.
what u beleive is knight more powerful or bishop?, express with reasons.