Question 24 of 24advanced🔧 ApplyNumerical5 marks
(a) For the telescope described in Exercise 9.27 (a), what is the separation between the objective lens and the eyepiece? (b) If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens? (c) What is the height of the final image of the tower if it is formed at 25 cm?
(a)
Answer
145 cm
(b)
Answer
14/3 cm (approximately 4.67 cm)
(c)
Answer
28 cm
Explanation
This question is based on Exercise 9.27 which describes a telescope with objective focal length 140 cm and eyepiece focal length 5.0 cm. Part (a) refers to normal adjustment where the final image is at infinity. Parts (b) and (c) involve calculating image heights using lens formula and magnification concepts.