. Which term describes an image that is in the opposite orientation than the object from which it was formed? A) virtual       B) lateral       C) erect       D) inverted

11. Describe the change in image characteristics if an object is move from the center of curvature of a concave mirror to its focal point. A. It remains a virtual image but it gets bigger B. It remains a real image but it gets bigger C. It changes from a real to a virtual image D. It changes from virtual to a real image

9. A tube of Chapstick (4 cm tall) is placed 15 cm in front of a diverging lens( Radius =20 cm) 1 f f x=0 a) Draw 3 ray diagrams on the above picture. b) What is the location of the image? c) What is the height of the image? d) Is the image real or virtual?

An object is placed 50 cm from a convex lens of radius 60 cm. What are the characteristics of the image? A) virtual and upright   B) real and inverted   C) real and upright   D) virtual and inverted  An object is placed at a distance of 18.0 cm to the left of a thin converging lens of focal length 10.0 cm. Where does the image form?   A) 22.5 cm to the right of the lens   B) 22.5 cm to the left of the lens   C) 8.0 cm to the right of the lens   D) 6.4 cm to the right of the lens . What best describes the set of focal points of a thin convex lens? *   A) one focal point located either in front of or behind the lens   B) two focal points on opposite sides of the lens, each the same distance to the lens   C) two focal points on the same side of the lens, with one point twice as far from the lens as the other point   D) two focal points on opposite sides of the lens, with one point twice as far from the lens as the other…

2. When you stand in front of a flat mirror, is your image inverted (top to bottom)? Are your left and right reversed? How about front and back? Fundamentally, then, what is reversed? Draw a simple ray diagram to demonstrate.

Problem 96. Indicate the single lens type (converging or diverging) and object position that will lead to the following kind of images. If no single lens system can produce the particular image indicate that this is so. A) real, upright, enlarged image. B) huge image at "infinity". C) real, enlarged, inverted image. D) tiny inverted image very near the focal point. E) real, reduced in size, inverted image. F) virtual, reduced in size, upright image. G) virtual, enlarged, upright image. H) real, inverted image that is the same size as the object. I) virtual, enlarged, inverted image. Problem 97. You are handed a converging lens and you have a ruler. Describe two different simple ways to determine the focal length of this lens. Each way should involve making only one measurement.

6. An object is 185 cm from a convex lens with a focal length of 25 cm. When an inverted image is 12 cm tall, how tall is the associated object? 7. What are the image height and orientation produced by the setup in the following figure? Object 5.0 cm – 10.0 cm - 15.0 cm

he bottom of the pool? 3) A ? cm-high object is placed 10 cm from a concave mirror of radius 40 cm. Determine he position, size, nature and orientation of the image made by the mirror.

16) An object is located a distance do=5.1 cm in front of a concave mirror with a radius of curvature r = 24.5 cm. a) Write an expression for the image distance, di.  b) Numerically, what is the image distance, di, in centimeters?  c) Is this a real or virtual image?

ASSESSMENT QUESTIONS: 1. A light bulb is shown below, shining into a concave mirror, with its original light lines visible. Which statement best explains why the image of the bulb appears behind the mirror, as shown? -20 -5 10 20 25 30 O A. The original light comes from there. O B. The reflected light comes from there. O C. The original light appears to come from there. This is often indicated with dotted apparent light lines. O D. The reflected light appears to come from there. This is often indicated with dotted apparent light lines. 2. An actual light bulb is shown below, with a concave mirror. The blue dot is the focal point of the mirror. What best describes the unseen image of this bulb? -15 -10 10 O A. Real, upside-down, and larger than the actual bulb. O B. Real, upside-down, and smaller than the actual bulb. O C. Virtual, right-side-up, and larger than the actual bulb. O D. There is no image at all in this case.