Please answer 3) and 4)

3) A light ray travels through air (n, = 1) into water (n2 = 1.33). The ray undergoes refraction due to the change in velocities as it passes from one medium to the other. (20 points) Incident ray n2 Refracted ray a) If you assume the velocity of light in air to be 3 x 108 %, find the velocity of light inside water . b) If the incident angle is 30 , find the refracted angle of the ray. c) If you change the light source so that now the light beam is traveling from water (n=1.33) to air (n=1), Calculate the critical angle of the light ray. What will happen if the incident angle is larger than the critical angle? d) A hungry bald eagle is looking at a fish swimming in the river. The fish is 20cm below the water surface. Where would the bald eagle see the image of the fish? (Find the image distance from the water surface) lead the questions ca 4) An object is placed in front of a converging mirror. The mirror has a focal length of 3cm, and the object is kept 9 cm away from the mirror. (20 points) Go a) Draw a ray diagram depicting the 3 special rays. Is the image Real or Virtual? b) Find the location of the image using the lens equation. c) If you move the object closer to the mirror and place it 2cm in front of the mirror how will the image change (Explain, you may use a ray diagram sketch or the equation if necessary). d) Will the image be Real or Virtual? Upright or inverted