WorksheetsGanesh sir
Total questions: 20
Worksheet time: 10mins
If an object is placed at the centre of curvature, where will the image be
formed?
At the focus
Between focus and center of curvature
At the centre of curvature
At beyond the center of curvature
Light beam which is highly directional is called
Tourch
Laser
Both tourch and laser
None of above
Mirage is an example of
Refraction and total internal
reflection of light
Reflection and refraction
Reflection and total internal reflection
Only Refraction
Red light is used at traffic signals because
Red light disperses more
Red light disperses the least
Red light not disperses
Option A & B BOTH
The power of concave lens is
Positive
Negative
Both
Neutral
What’s the lens formula?
1/v + 1/u = 1/f
1/v – 1/f = 1/u
1/v – 1/u = 1/f
1/u– 1/v = 1/f
Which lens can correct Astigmatism?
Concave lens
Convex lens
Bifocal lens
Cylindrical lens
Which lens is present in the human eye?
Bifocal lens
Concave lens
Convex lens
Both concave and convex
If an object is placed between focus and pole, where will the image be
formed?
At focus
At center of curvature
Between F and C
Behind the mirror
What is minimum distance vision?
23cm
24cm
25 cm
26 cm
Which of following are not primary colors?
Red
Yellow
Blue
Green
Which lens corrects Myopia?
Convex
Bifocal
Concave
None of above
Name the middle layer of eye?
Sclera
Choroid
Retina
Cornia
What is the speed of light in glass?
2.25*108 m/s
3*108 m/s
2*108 m/s
2.75*108 m/s
When ray of light travels from air to water/glass then ray of light bends
Away from normal
Going straight
Towards normal
Not possible to pass light
At retina where image forms called
Blind spot
Red spot
Blue spot
Yellow spot
White light consists of
6 color
7 color
8 color
9 color
Name the color which has the highest refractive index but less wave length?
Red
Blue
Yellow
Violet
Bright red colour of Sun at the time of sunset and sunrise due to
Reflection of light
Scattering of light
Refraction of light
Dispersion of light
Colour of eye Defined by
Pupil
Iris
Retina
Cornea
