page 5 of 14. A camera is focused on a nearby object. The object is imaged on th
ID: 2305672 • Letter: P
Question
page 5 of 14. A camera is focused on a nearby object. The object is imaged on the film, which is 3.0cm behind the camera lens. What can you say about the tocal length fof the lens? B) f- 3.0em C) f> 3.0cm D) There is not enough object 3.0m information to say anything about f 15. An object is placed 15 cm in front of a diverging lens with a f-25 em focal length. The image formed is .. (Hint: Sketch the ray diagram! B) real, inverted, and enlarged. D) virtual, inverted, and enlarged. A) real, upright, and reduced C) virtual, upright, and reduced. E) none of these 16. The index of refraction n of glass decreases for longer wavelengths (n is smaller for red light than for violet light.) A very distant point source of red light is imaged by a converging lens onto a screen. The red image on the screen is in sharp focus, If the light source changes from emitting red to emitting violet light, then, in order for the new violet image on the screen to be in sharp focus, the screen A) must not be moved. B) must be moved further from the lens C) must be moved closer to the lens. Di can be placed at any distance from the lens; the point source will always be in focus 17. A right-angle prism is a piece of transparent material with flat sides in the shape of a 450-450.90° triangle. Rays entering one side at normal incidence undergo total internal reflection and come out at right angles to the incident direction, as shown. However, if the index of refraction n of the material is too small, total internal reflection will not occur. What is the minimum value of n required (to 3-place precision)? (Assume that the prism is surrounded by air.) A) 1.4 D vew 450 Side vie 1.55 E) 2.00 C) 1.33 D) 1.18 vers, 0001Explanation / Answer
Ouestion 14 answer is option b
By looking at the ray diagram given . The focal length of lense is 3 cm beacuse ray from passing have to passe through the focus on other side
As per chegg policy i had answered very first question
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