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Answer question (a) - (e) on the basis of data given in the following table and your understanding of the relation studied concepts : In a school laboratory following lenses are available : All these lenes are converging lenses. Which two lenses would you choose to prepare an astronomical telescope? Give reason for your choice. |
| Answer» SOLUTION :To design an astronomical TELESCOPE we SHELL select LENS no. 3 (focal length f = 100 cm and aperture A = 20 cm) as the objective lens and lens no. 11 (focal length f = 2 cm and aperture A = 1.5 cm) as the eyepiece because focal length and aperature of objective of a telescope should be as possible but focal length and aperature of eyepiece should be small. | |