CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The focal lengths of objective and eye lens of anastronomical telescope are respectively $$2 m$$ and $$5 cm$$. Final image is formed at (i) least distance of distinct vision, (ii) Infinity. Magnifying power in two cases will be:


A
48,40
loader
B
40,48
loader
C
40,+48
loader
D
48,+40
loader

Solution

The correct option is A $$ -48, -40$$
$$(i)\ M = \dfrac {f_o}{f_e} = \dfrac {5}{2m} \dfrac {200}{5} = -40$$

$$(ii) \ M = \dfrac {-f_o}{f_e} (1 + \dfrac {5}{25}) = -40 [\dfrac {30}{25}] = -48$$

Physics
NCERT
Standard XII

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
Same exercise questions
View More


similar_icon
People also searched for
View More



footer-image