Pls answer all

1. In the compound microscope shown in diagram below, the objective and eyepiece have focal lengths of +0.80 and +2.5 cm, respectively. The real image A 'B' formed by the objective is 16 cm from the objective. Determine the total magnification if the eye is held close to the eyepiece and views the virtual image A" B" at a distance of 25 cm. Eyepiece Objective to Tower B nam worl yd mo b.es is/ion tud nie s es signal Isoot mo-a. \\ now at gallos qmate A 2. A certain nearsighted person cannot see distinctly objects beyond 80 cm from the eye. What is the power in diopters of the spectacle lenses that will enable him to see distant objects clearly? 3. An engraver who has normal eyesight uses a converging lens of focal length 8.0 cm which he holds very close to his eye. At what distance from the work should the lens be placed, and what is the magnifying power (magnification) of the lens? nis reno ipool (s) ert ed bluerie law ,mo 0.as.to comstalb 4. Reflecting telescopes make use of a concave mirror, in place of the objective lens, to bring the distant object into focus. What is the magnifying power of a telescope that has a mirror with 250 cm radius and an eyepiece whose focal length is 5.0 cm? 5. A camera gives a clear image of a distant landscape when the lens is 8 cm from the film. What adjustment is required to get a good photograph of a map placed 72 cm from the lens? OS 19