If you hold a 900-cm2 square plane mirror 45 cm from your eyes and can just see the full length of an 8.5-m flagpole behind you, how far are you from the pole?
Answer to relevant QuestionsWhen an object is moved closer to a convex mirror, its image size (1) increases, (2) remains the same, (3) decreases. Prove your answer mathematically. An object 4.0 cm tall is in front of a converging lens of focal length 22 cm. The object is 15 cm away from the lens. (a) Use a ray diagram to determine whether the image is (1) real or virtual, (2) upright or inverted, and ...A simple single-lens camera (convex lens) is used to photograph a man 1.7 m tall who is standing 4.0 m from the camera. If the man’s image fills the height of a frame of film (35 mm), what is the focal length of the lens? A woman fixing the hair on the back of her head holds a plane mirror 30 cm in front of her face so as to look into a plane mirror on the bathroom wall behind her. She is 90 cm from the wall mirror. (a) The image of the back ...A plastic convex meniscus (Fig. 23.14) contact lens is made of plastic with an index of refraction of 1.55. The lens has a front radius of 2.50 cm and a back radius of 3.00 cm. (a) The signs of R1 and R2 are (1) +, +, (2) ...
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