The distance between an object and its image formed by a diverging lens is 45.3 cm. The focal length of the lens is -247 cm. Calculate the image distance, Answer: Submit All Answers
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- The lens-makers' equation can be written as 1 7- (22²-¹²/²-1/2) (R₁₂ = n₁ R₂ where n₂ represents the index of refraction of the lens material and n₁ is that of the medium surrounding the lens. (a) A certain lens has focal length 57.8 cm in the air and index of refraction 1.55. Find its focal length in water. (Give your answer in cm.) cm (b) A certain mirror has focal length 57.8 cm in the air. Find its focal length in water. (Give your answer in cm.) cmThe focal point is located 20.0 cm from a double concave lens. An object is placed 12 cm from the lens. Determine the image distance.A student with normal sight is surprised to see a possum scampering up the rear wall in the Lyle theatre. The possum is 30.0 cm long and the wall is 7.1 m away. The student's eyeballs have a diameter of 2.2 cm.How big is the image of the possum on the student's retina? (Units: cm)
- A camera with a 70 mm lens takes a photograph of a 2.10 m-tall object located 46 m away. Calculate the height of the image (in mm) on the film. Enter the numerical part of your answer to one decimal figure. Hint: Remember that the sign of the magnification is significant.The near point of a naked eye is 31 cm. When an object is placed at the near point and viewed by the naked eye, it has an angular size of 0.059 rad. A magnifying glass has a focal length of 15 cm, and is held next to the eye. The enlarged image that is seen is located 63 cm from the magnifying glass. Determine the angular size of the image. Number i eTextbook and Media Units >You are designing a symmetric double convex lens that is made of glass with index of refraction equal to 1.33 and has a focal length of +0.711 m. What curvature radius of the lens surface should you use (in m; answer a positive number)? Give answer in 3 sig figs and scientifc notation
- A lens forms an inverted, double-sized image of an object placed 9 cm away. Calculate the focal length of the lens.(Give your answer in centimeters)A transparent photographic slide is placed in front of a converging lens with a focal length of 2.53 cm. An image of the slide is formed 12.0 cm from the slide. (a) How far is the lens from the slide if the image is real? (Enter your answers from smallest to largest starting with the first answer blank. Enter NONE in any remaining answer blanks.) cm cm (b) How far is the lens from the slide if the image is virtual? (Enter your answers from smallest to largest starting with the first answer blank. Enter NONE in any remaining answer blanks.) cm cm Need Help? Master ItIf the distance of the object is 250 cm and the distance of the image is 140 cm, I say that the focal length is 390 cm. true or false
- A camera with a 110 mm lens takes a photograph of a 1.10 m-tall object located 41 m away. Calculate the height of the image (in mm) on the film. Enter the numerical part of your answer to one decimal figure. Hint: Remember that the sign of the magnification is significant.An object (height = 7.7 cm) and its image are on opposite sides of a converging lens. The object is located 14.0 cm from the lens. The image is located 5.6 cm from the lens. Determine the image height (in cm). Enter the numerical part of your answer to two significant figures. Hint: Remember that the sign of the image height is significant.A concave lens has a focal length of -45 cm. a) Find the image distance that results when an object is placed 32 cm in front of the lens. b) Find the magnification that results when an object is placed 32 cm in front of the lens.