2. Go to: https://phet.colorado.edu/sims/html/geometric- optics/latest/geometric-optics_en.html and answer the following questions. Choose an arrow object from the tab and answer the following questions: • If an object is placed between a converging ('convex') lens and its focal point, the image formed is: A) virtual and upright. B) virtual and inverted. C) real and upright. • Arrow Pencil Penguin Star Arrow Light D) real and inverted. Which of following statements about the image formed by a single diverging ('concave') lens are true? (There could be more than one correct choice.) A) The image is always real. B) The image is always virtual. C) The image is always inverted. D) The image is always upright. E) None of the choices above is correct.

2. Go to: https://phet.colorado.edu/sims/html/geometric- optics/latest/geometric-optics_en.html and answer the following questions. Choose an arrow object from the tab and answer the following questions: • If an object is placed between a converging ('convex') lens and its focal point, the image formed is: A) virtual and upright. B) virtual and inverted. C) real and upright. • Arrow Pencil Penguin Star Arrow Light D) real and inverted. Which of following statements about the image formed by a single diverging ('concave') lens are true? (There could be more than one correct choice.) A) The image is always real. B) The image is always virtual. C) The image is always inverted. D) The image is always upright. E) None of the choices above is correct.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter2: Geometric Optics And Image Formation

Section: Chapter Questions

Problem 106P: Construct Your Own Problem Consider a telescope of the type used by Galileo, having a convex...

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Construct Your Own Problem Consider a telescope of the type used by Galileo, having a convex objective and a concave eyepiece as illustrated in part (a) of Figure 2.40. Construct a problem in which you calculate the location and size of the image produced. Among the things to be considered are the focal lengths of the lenses and their relative placements as well as the size and location of the object. Verify that the angular magnification is greater than one. That is, the angle subtended at the eye by the image is greater than the angle subtended by the object.
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A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal length of 9.50 mm. With the length of the barrel set at 29.0 cm, the diameter of a red blood cells image subtends an angle of 1.43 mrad with the eye. It the final image distance is 29.0 cm from the eyepiece, what is the actual diameter of the red blood cell? Hint: To solve this question, go back to basics and use the thin-lens equation.