Relationship true? Does your ray diagram support this conclusion? III. WHY DID W

Question

Relationship true? Does your ray diagram support this conclusion? III. WHY DID WE DO THIS LAB? Why should you (and scientists in general) use multiple trials when testing a hypothesis? At some point, you should have "lost" the image (it did not appear anywhere on the screen). Why did this happen? Does this make sense with the thin-lens equation? When do we use lenses in real life? Why should we care about lenses? List at least 2 specific examples. What w as the point of this class? What did you learn? What was your 'lake away" from this class? What can you use from this class in the future?

Explanation / Answer

Solution:

1) Multiple trials done at one time , for the same experiment will help in getting Consistent results . These results are not altered by random events.

2) When the lens or mirror forms a virtual image , it cannot be caught on a screen and that makes the image lost . When the object is placed within the focal length , a vitual image (like the image formed in a looking mirror) is formed . Lens equation is still valid for a virtual image .

3) Lenses are used in real life in microscopes, telescopes, as magnifying lenses etc. Convex lenses are used for the correction of hypermetropia , in Spectacle lenses. .

Concave lenses are used in spectacles for the correction of short sighted vision, they are also used in door peep holes to observe the person knocking the door. Concave lenses are also used in binoculars and in Flash lights.

4) The purpose of the experiment is to get an image using the lenses . Apply the thin lens formula and then find the focal length of the lens. The experiment will help in knowing the difference between a Real image and a virtual image and also difference between different types of lenses.

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