Please answer all questions

PHY154 Tutorial Test Optics Question 1 .. .. Calculate the critical angle for an slab made of Plexiglas. The index of refraction of Plexiglas is 1.51. . 4 Question 2 .... ...... . . . 4 Calculate the polarization angle for light rays incident from air into a dense flint glass (n=1.655). Question 3 .. . ...... ..3 An insect is trapped inside a piece of amber and appears to be 17.0 mm below a smooth surface of the amber. How far below the surface is the insect? Make a drawing showing all the relevant information and name them correctly. Question 4 ...... . .. 9 A 2.50 cm tall object is placed 25.0 cm in front of a concave mirror with a focal length of 10.0 cm. (a) Calculate the position of the image. (b) Calculate the lateral magnification. (c) Draw a ray diagram to illustrate the situation