2004
NEET
MCQ
AIPMT 2004
A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000 $\mathop A\limits^ \circ $, is of the order of
A.
0.5 m
B.
5 m
C.
5 mm
D.
5 cm
2001
NEET
MCQ
AIPMT 2001
A ray of light travelling in air have wavelength $\lambda $, frequency n, velocity v and intensity $I$. If this ray enters into water then these parameters are $\lambda $', n', v' and $I$' respectively. Which relation is correct from following ?
A.
$\lambda $ = $\lambda $'
B.
n = n'
C.
v = v'
D.
$I$ = $I$'.