Plz help

its lidiged particle has an energy 1,000 times higher than a proton in the Large Hadron Collider and so effectively travels at a speed c through the ice where c is the speed of light in vacuum. The particle acts as a source of light and produces a visible shockwave in the ice in exactly the same manner as a supersonic plane produces a sonic shockwave. If there is an angle of 49.8 between the shockwave of light and the path of the particle, what is the refractive index of ice? (a) 1.183 (b) 1.309 (c) 1.362 (d) 1.549 (e) 2.228 16. Two waves described by the wave functions: out of phase 1( RX e VI(x, t) = Acos(kx - wt) and P2(x, t) = Acos(kx - wt + 0.5 rad) are travelling in the same medium. What is the amplitude of the resulting wave? (a) 0.49A (b) 0.88A (c) 0.97A (d) 1.76A (e) 1.94A 1 XX ZA 705 AtB los A - B e 2