40. Using the "rules for light rays" sketch ray diagrams for the following lenses. State whether the image is: Real or virtual, erect or inverted, and larger or smaller than the object. 2f 2f 2f he 2f 2f f 2f 2f f f 2f 2f che he 2f he28. Ught is incident on an equilateral Lucite prism (n = 1.5) at an angle of 35'. Calculate the angle that the light leaves the prism. (66") 29. From inside an aquarium a ray of light is directed at the glass so the angle of incidence, in water, is 30'. (a) Determine the angle of refraction when the ray emerges from the glass into the air. (b) If the angle of incidence in the water is 52\" at what angle will the rays emerge from the glass? (42", no ray emerges) air 30. The critical angle from rock salt into air is 40.5\". What is the index of refraction for rock salt? (1.54) 31. The refractive indices of diamond and crown glass are 5/2 and 3/2 respectively. What is the critical angle between diamond and glass? (37') Lesson 5: Refraction (Spherical lenses) 32. An object 8.0 cm high is placed 80 cm in front of a converging lens of focal length 25 cm. Determine the image position and its height. (36 cm, 3.6 cm) 33. A lamp 10 cm high is placed 60 cm in front of a diverging lens of focal length 20 cm. Calculate the image position and the height of the image. (15 cm, 2.5 cm) 34. A typical single lens reex (SLR) camera has a converging lens with a focal length of 50.0 mm. What is the position and size ofthe image ofa 25 cm candle located 1.0 m from the lens? (5.3 cm, -1.3 cm) 35. A converging lens with a focal length of 20 cm is used to create an image of the sun on a paper screen. How far from the lens must the paper he placed to produce a clear image? (20 cm) 36. A convex lens has a focal length of + 20 cm and a magnication of 4. How far apart are the object and the image? (45 cm) 37. A projector is required to make a real image, 0.50 m tall, of a 5.0 cm object placed on a slide. Mthin the projector, the object is to be placed 100 cm from the lens. What must be the foal length of the lens? (9.1 cm) CBeLearn Physics 30 Module 5 Assignment November 2020 38. An object 5.0 cm high is placed at the 20 cm mark on a metre stick optical bench. A converging lens with a focal length of 20 cm is mounted at the 50 cm mark. What are the position and sile ofthe image relative to the metre stick? (110 cm, -10 cm) 39. Acamera lens has a focal length of 6.0 cm and is located 7.0 cm from the lm. How far from the lens is the object positioned if a clear image has been produced on the lm? (42 cm) 40. Using the "mles for light rays\" sketch ray diagrams for the following lenses. State whether the image is: Real or virtual, erect or inverted, and larger or smaller than the object. .l . 2f f '1 M: > I no N