Light
9th Standard
Science
The field of view is maximum for ________
plane mirror
concave mirror
convex mirror
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is
0o
45o
90o
120o
_________ is used as reflectors in torchlight.
concave mirror
convex mirror
plane mirror
None of these
The focal length of a concave mirror is 5cm. Its radius of curvature is
5 cm
10 cm
2.5 cm
When a beam of white light passes through a prism it gets
Reflected
deviated and dispersed
only deviated
refracted
Mirrors having spherical surface of reflection are __________________
plane mirror
lenses
spherical mirrors
prism
A spherical mirror which has reflecting curved inward surface is ____________________mirror
concave
convex
plano concave
plano convex
The mirror that diverge the light rays is______________________
concave
convex
plane
None of these
The centre of the sphere of which a spherical mirror is a part is called ______________________
pole
radius of curvature
focus
centre of curvature
The centre of the reflecting surface of a spherical mirror is _____________________
centre of curvafure
focus
pole
radius of curvature
In going from a rarer to denser medium, the ray of light bends _________
The ratio of sine of the angle of incidence to the sine of _________ is a constant
The mirror used in search light is ________ .
Light travels in the form of _____________________________
The branch of optics that treats light as rays is named ray optics or_________________________
The angle of deviation depends on the refractive index of the glass
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
If the object is at infinity in front of a convex mirror the image is formed at infinity.
Mirror equation is \(\frac { 1 }{ f } =\frac { 1 }{ u } -\frac { 1 }{ v } \)
In sign convention for spherical mirrors the object is always placed on the right side of the mirror.
Answers
convex mirror
45o
concave mirror
10 cm
deviated and dispersed
spherical mirrors
concave
convex
centre of curvature
pole
towards the normal
Infraction
concave mirror
electromagnetic waves
geometrical optics
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