Consider the general reversible reaction. Lower a upper a plus lower b upper b double-headed arrow lower c upper c plus lower d upper d. What is the equilibrium constant expression for the given system?.

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity