20. Read the following and answer any four questions.Refraction explain some sfrange effects which you mayhave already noticed. The bottom of the swimming pool,for example, always looks closer to the surface than it reallyis. Similarly, a fish near the bottom of a river or a pond isalways deeper than it seems. The light entering your eyefrom point A on the fish appears to come from point A'. Youreye sees the fish higher up than it really is. The apparentdepth is less than the real depth.1) Which of the following phenomenon is the cause of above situation?a) Reflection b) Refraction c) Dispersion d) Both (a) and (b) The light entering your eye from point A on the fish appears to be from A' becausea) light travelled from less denser medium to denser mediumb) light travel from denser medium to less denser mediumc) The apparent depth is more than real depthd) None of theseAray of light passes from air into water. The angle of refraction will bea) equal to the angle of incidence b) greater than the angle of incidencec) smaller than the angle of incidence d) 45°iv) Refractive indices of water, sulphuric acid, glass and carbon dioxide are 1.33, 1.43,1.53 and 1.63 respectively. In which of these media a ray of light incident obliquely atsame angle would bend the most?a) Water b) Glassc) Carbon dioxide d) Sulphuric acid5​