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WorksheetsPhysics question quiz
Total questions: 15
Worksheet time: 24mins
The focal length of the concave mirror in the experimental set up shown below is :
10.2 cm
11.0 cm
11.4 cm
12.2 cm
What is nature of the image
(a)
Which is the uses of combination of lens ?
Increase the magnification
Highlight the object
headlight of vehicle
Reduce the magnification
An object is placed at 2f1 in front of the convex lens. Where is the image formed?
(a)
The absolute refractive index of medium is always
1
0
Less than 1
Greater than one
A convex lens of focal length 20cm produces a real image of the object when it is 30 cm away. find position and magnifications of the image?
(a)
What will be the focal length of lens whose power is given as +2.0D?
(a)
Which has least refractive index ?
Water
Air
Glass
Kerosene
n21 × n12 = ?
(a)
Which of the following lenses would you prefer to use while reading a small letters found in the dictionary ?
A convex lens lens of focal length 50 cm
A concave lens of focal length 50 cm
A convex lens of focal length 5 cm
A concave lens of focal length 5 cm
In optical fibres the principle used is
Scattering
Total external Reflection
Refraction
Total internal reflection
Optical density of medium depends on
Density of medium
Thickness of medium
velocity of light in that medium
None
A convex lens is distinguished from a concave lens by the property of
Divergence
Linear propagation
Convergence
Looming
What is dioptre?
A concave lens of focal length 15cm forms an image 10cm from the lens. How far is the object placed from the lens?
(a)
