An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at opposite ends of a 48.0 cm long tube. If the eyepiece has a focal length of 1.60 cm, calculate the required focal length in cm of the objective lens and the angular magnification of the telescope. HINT (a) the required focal length in cm of the objective lens  cm (b)

A spherical concave lens has a focal length of 50 cm, and an object is placed 20 cm from the lens. Draw a ray diagram. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen Estimate the image distance. cm

Q4) The focal length of the eyepiece of a certain microscope is 18.0mm. The focal length of the objective is 8.00mm. The distance between objective and eyepiece is 19.7cm. (a) What is the distance from the objective to the object being viewed? (b) What is the magnitude of the linear magnification produced by the objective? (c) What is the overall angular magnification of the microscope?

An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at opposite ends of a 46.5 cm long tube. If the eyepiece has a focal length of 1.70 cm, calculate the required focal length in cm of the objective lens and the angular magnification of the telescope. HINT (a) the required focal length in cm of the objective lens  cm (b) the angular magnification of the telescope

A microscope in the lab uses a lens with a focal length of 8.0 mm and an eyepiece with a focal length of 18 mm. The distance between the lens and the eyepiece is 19.7 cm. We use the microscope so that the eyes focus as if the object were placed infinitely far away. We treat the lenses as if they were "thin". a) How much distance must there be between the object and the lens when using the microscope?

An object is placed 66 cm in front of a converging lens of focal length 9 cm. Another converging lens of focal length 14 cm is placed 26 cm behind the first lens. a) Find the position of the final image with respect to the second lens. cm b) Find the magnification of the final image.

Problem 103. A) How do the lenses in glasses designed to correct nearsighted eyes with no astigmatism differ from the lenses designed to correct nearsighted eyes with astigmatism? B) Why can reshaping the cornea with a laser correct the far vision of a nearsighted person?

A person with a normal near point (25 cm) using a compound microscope with objective of focal length 8.0 mm and an eyepiece of focal length 2.5cm can bring an object placed at 9.0mm from the objective in sharp focus. What is the separation between the two lenses? Calculate the magnifying power of the microscope,

3. An object is placed 12.0 cm in front of a diverging lens of focal length 6.0 cm. Find the image, its properties and the magnification. A plano-convex lens having a focal length of 25.0 cm is to be made of glass of refractive index n = 1.520. Calculate the radius of curvature of the grinding and polishing tools that must be used to make this lens. 4.