1
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
An astronomical telescope has a large aperture to
A
reduce spherical aberration
B
have high resolution
C
increase span of observation
D
have low dispersion
2
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
If two mirrors are kept at $${60^ \circ }$$ to each other, then the number of images formed by them is
A
$$5$$
B
$$6$$
C
$$7$$
D
$$8$$
3
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
Wavelength of light used in an optical instrument are $${\lambda _1} = 4000\mathop A\limits^ \circ $$ and $${\lambda _2} = 5000\mathop A\limits^ \circ ,$$ then ratio of their respective resolving powers (corresponding to $${\lambda _1}$$ and $${\lambda _2}$$ ) is :
A
$$16:25$$
B
$$9:1$$
C
$$4:5$$
D
$$5:4$$
4
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following is used in optical fibres?
A
total internal reflection
B
scattering
C
diffracttion
D
refraction
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