The image which cannot be formed on a screen is called
Virtual image
Real image
Laterally inverted image
Diminished image
Linear magnification m is given by
m = height of the image / height of the object
m = height of the object / height of the image
Distance of the image from the lens / distance of the object from the lens.
m = Distance of the object from the lens / height of the image
The converging lens in our eye will form a
Real inverted image on the retina
Virtual inverted image on the retina
Virtual erect image on the retina
Real erect image on the retina
The bending up of light when passing from one medium to another is known as
reflection
refraction
dispersion
none of these
A person watching a fish in a fish tank, its size thus seen will be
big
small
not comparable
Which prism replace mirrors in good periscope?
Totally reflecting prism
Diffuse reflecting prism
Regular reflecting prism
Triangular glass prism
Among the given refractive index which one is more denser ?
1.2
1.25
2.4
3
A diverging lens has
A real principal focus
A virtual principal focus
No principal focus
A principal focus same as a converging lens
The centre of the lens is its
Principal axis
Principal focus
Optic centre .
Focal length.
Light enters from air into a glass plate having refractive index 1.50. What is the speed of light in glass ?(The speed of light in vacuum is 3 x 108 m/s)
2 x 108 m/s
1.82 x108 m/s
4 x108 m/s
