(xii) Deline conductance.
(xii) Temperature of a metal in Fahrenheit is 122 °F. What will be the temperature of same
metal in 'C?
(iv) Focal length of the objective of an astronomical telescope is Im. Under normal
Die 15 calculate focal length of eveniece!
Answers
temperature in degree Celsius is 50°C.
temperature of metal in Fahrenheit is 122°F . we have to find temperature in °C.
using the relation, (F - 32)/180 = C/100
⇒(122 - 32)/180 = C/100
⇒90/180 = C/100
⇒C = 50° C
hence, temperature in degree Celsius is 50°C.
magnifying power = objective focal/eyepiece focal length
⇒15 = 1m/eyepiece focal length
⇒eyepiece focal length = 1/15 m = 100/15 cm = 20/3 = 6.67 cm
hence, focal length of eyepiece is 6.67cm
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