Ray Optics Seeing Images through thin lenses 4) Based on the ray tracings and yo

Question

Ray Optics Seeing Images through thin lenses 4) Based on the ray tracings and your calculations using the thin lens equation, determine if each of the following statements is true or false: a) Areal image is always on the opposite side of a converging lens from the object. b) A virtual image is always on the same side of a converging lens as the object. c) A virtual image is always on the same side of a diverging lens as the object. d) A converging lens will always make a real image when the object is within the near f e) A diverging lens will always make a virtual image that is smaller than the original object. f) A real image made by a converging lens will always be smaller than the original object. g) A virtual image made by a converging lens will always be larger than the original object. 6) Which lens setups produce images that are bigger than the object? Which lens setups produce images that are smaller than the object? 7) Which lens setups produce images whose distance you can measure accurately? 8) As the object gets closer to the converging lens, what happens to the image distance? 9) As the object gets closer to the diverging lens, what happens to the image distance? 10) 11) the image size? Does changing the object distance change the focal length of the lens? When a lens forms a real image of a distant object, how does the size of that image depend on the focal length of the lens?

Explanation / Answer

4. a. based on ray tracing and calculations using this lens equation

a. a real imag eis always on the opposite side of any lens, hence true

b. a virtual image on the same side of the converging lens, hence true

c. the virtual image is also always on the same side of a diverging lens, hence true

d. a converging lens will always make a virtual image when the object is within near f, hence false

e. a diverging lens always makes a smaller and virtual image, hence true

f. real image made by converging lens is smaller/larger depending upon object location, hence false

g. a virtual image made by converging lens is always laerger than the object, hence true

6. to produe images bigger than objects

converging lens is used when object is placed between 2f and f ( for real enlarged images)

converging lens with object location < f ( virtual enlarged image)

for smaller images

converging lens is used for object distance > 2f

diverging lens for any object lens configuration

7. for object distance > f, the real image formed by converging image can be measured accurately as the image distance

8. AS THE OBJECT COMES CLOSER TO THE CONVERGING LENS, the image distance initially increases upto infinity, till the object has reached the point f. after this, when the object is brought closer, the image starts coming closer to the lens from infinity

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