Worksheetslight reflection and refraction
Total questions: 15
Worksheet time: 8mins
If an object is placed at the focus of a concave mirror where is the image formed
At infinity
At focus
At centre of curvature
Beyond c
Converging lens
Concave lens
Convex lens
Both lenses
None of the above
A convex lens has a focal length of 10cm . What is its power?
+1 diopter
+10 diopter
-5 diopter
-25 diopter
An object is placed at a distance of 12cm in front of a concave mirror of radius of curvature 30cm .Tick the .characteristics of the image formed by the mirror.
Virtual
Erect
Diminished
Inverted
In which direction A Ray of light bends when it goes from water to glass?
Away from normal
Towards the normal
No change in path
None of the above
What is the cause of refraction of light?
Because the speed of light is different in different media
Because light travels with same speed in any medium
Light travels with same velocity
All of the above
Refractive index of a medium with respect to vacuum is called
Relative refractive index
Absolute refractive index
Advanced refractive index
None of the above
What sign is given to the focal length of a concave mirror
Positive sign
Negative sign
Any one positive or negative
A medium in which light travels comparatively faster than the other medium is called an
Optically denser medium
Optically rarer medium
Optical liquid medium
Optical solid medium
Which mirror convex or concave has larger field of view?
Concave mirror
Convex mirror
Both
None of the above
What kind of image can be obtained on a screen
Real image
Virtual image
Both
None of the above
Second law of reflection states that angle of incidence and angle of reflection is
Always equal
Never equal
Sometime equal
None of the above
The ratio of sine of angle of incidence to the Sine of angle of refraction is is a a constant for a given pair of media
Second law of refraction
Snell's law
Law of reflection
All of the above
Coming back of light rays to the same medium when they fall on a body is known as
Refraction
Reflection
Both
None of the above
Bending of light when it passes from one medium to another is called
Disturbance
Reflection
Refraction
None of the above
