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Recent questions tagged ray optics
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Discuss refraction of monochromatic light through a prism and Derive prism formula ?
asked
Apr 7, 2019
in
Class 12
by
kratos
neet
optical instruments
aiims
ray optics
class-12
+3
votes
1
answer
An astronomical telescope has a large aperture to (a) reduce spherical aberration.
asked
Apr 6, 2019
in
JEE
by
kratos
optical instruments
ray optics and optical instruments
jee
class-11
optics
jee mains
ray optics
class-12
+2
votes
1
answer
A concave mirror gives a real image magnified 4 times. When the object is moved 3 cm the magnification of the real image is 3 times.
asked
Apr 6, 2019
in
JEE
by
kratos
class-11
jee
jee mains
ray optics
class-12
+1
vote
1
answer
The radii of curvatures for a convex lens of a focal length 20 cm are 18 cm and 24 cm. What is the refractive index of the glass?
asked
Apr 6, 2019
in
Class 12
by
kratos
ray optics
class-12
+1
vote
1
answer
A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm from the lens.
asked
Apr 5, 2019
in
JEE
by
kratos
irodov
cbse
jee
optics
class-10
injso
jee mains
jee mains 2019
ray optics
geometrical optics
+2
votes
1
answer
Two thin convex lens of power + 5 and +4 diopter are placed co-axially at a distance 10 cm.
asked
Apr 5, 2019
in
JEE
by
kratos
isc
light-reflection and refraction
cbse
optical instruments
ray optics and optical instruments
jee
icse
jee mains
ray optics
class-12
+3
votes
1
answer
Stars twinkle while the planets do not. why?
asked
Apr 5, 2019
in
Class 12
by
kratos
neet
ray optics
cbse
optical instruments
aiims
class-10
the human eye and the colourful world
+1
vote
1
answer
Does short-sightedness (myopia) or long sightedness (hypermetropia) imply necessarily that the eye has partially lost its ability of accommodation?
asked
Apr 3, 2019
in
Class 12
by
kratos
the human eyes and the colorful world
class-12
class-10
neet
ray optics
optics
optical instruments
special senses
aiims
+1
vote
1
answer
Assertion: A thick lens shows more chromatic aberration.
asked
Apr 3, 2019
in
Class 12
by
kratos
neet
optical instruments
aiims
ray optics
class-12
+1
vote
1
answer
A thin convex lens of refractive index 1.5 is placed in a liquid with refractive index 2.0. The power of the lens in air is 10 D.
asked
Apr 3, 2019
in
JEE
by
kratos
jee
jee mains 2019
jee mains
ray optics
class-12
geometrical optics
+3
votes
1
answer
Explain why the planets do not twinkle?
asked
Apr 3, 2019
in
Class 12
by
kratos
neet
ray optics
cbse
optical instruments
aiims
class-10
the human eye and the colourful world
+2
votes
1
answer
Write a note Scattering of light. State Rayleigh’* scattering law and hence explain Blue colour of the sky and reddish appearance
asked
Apr 2, 2019
in
Class 12
by
kratos
neet
cbse
optical instruments
aiims
class-10
ray optics
class-12
the human eye and the colourful world
+3
votes
1
answer
A hollow lens is made of thin glass and in the shape of a double concave lens. It can be filled with air,
asked
Apr 2, 2019
in
JEE
by
kratos
images
jee
optics
class-10
jee mains
ray optics
+2
votes
1
answer
For which wavelength is eye the most sensitive.
asked
Apr 1, 2019
in
Class 12
by
kratos
neet
optical instruments
aiims
ray optics
class-12
+3
votes
1
answer
For the same angle of incidence in media P, Q and R, the angles of refraction ate 45°,35° and 15° respectively.
asked
Mar 31, 2019
in
Class 12
by
kratos
light-reflection and refraction
cbse
class-11
ray optics and optical instruments
class-10
ray optics
class-12
+1
vote
1
answer
(i) Draw a neat labelled ray diagram of an astronomical telescope in normal adjustment. Explain briefly its working.
asked
Mar 31, 2019
in
JEE
by
kratos
cbse
optical instruments
ray optics and optical instruments
jee
class-11
jee mains
ray optics
class-12
+3
votes
1
answer
Two thin lenses of powers 5D and 2D are placed coaxilly at a distance 20 cm apart. Find the
asked
Mar 30, 2019
in
Class 12
by
kratos
light – reflection and refraction
cbse
optical instruments
class-10
ray optics
class-12
+2
votes
1
answer
Define linear magnification and obtain an expression for it?
asked
Mar 30, 2019
in
Class 12
by
kratos
ray optics
class-12
optical instruments
+3
votes
1
answer
A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options describe best
asked
Mar 30, 2019
in
JEE
by
kratos
irodov
jee
optics
bseb model set
jee mains
ray optics
class-12
geometrical optics
+1
vote
1
answer
Derive the expression for effective focal length of two thin lenses kept in contact.
asked
Mar 30, 2019
in
Class 12
by
kratos
isc
cbse
optical instruments
icse
ray optics
class-12
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