Waves need a media to travel and carry energy. A standing wave is an oscillation pattern with a stationary outline (envelope) that results either from the superposition of two identical waves travelling opposite directions or from an inner equilibrium vibration. A given particle that is bound (confined ) in a certain region of space is a standing wave and vibrates within the constraints of the envelope function y = 2A.sin(kx).cos.(wt) . Light is both, a particle and a wave.. Since quaternion, as work is constant then W = q = (Î», Â±Î›xâˆ‡i) = Force (P) acting on wavelength (Î») = Normal stress Ïƒacting on area A is, (Ïƒ.A)xÎ», and for A = 0 then becomes the linear Momentum = vô€´¤xÎ» (since Stationary energy becomes Kinetic) and W =vô€´¤xÎ», .i.e. Work = Travelling Energy and because when converted into, velocity,vô€´¤, in wavelength Î» as background media, then this is the reason that doesn`t collapse by radiating away its or their energy.