Science
Light and Optics Quiz
Test your knowledge on the fascinating world of light and optics with this engaging quiz! Challenge yourself with questions ranging from the properties of mirrors and lenses to the laws of reflection and refraction.
Participate to:
- Enhance your understanding of optical principles
- Prepare for exams or assessments
- Learn interesting facts about light!
Q1 :-A ray of light that strikes a plane mirror PQ at an angle of incidence of 30❰, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is:
30❰
45❰
60❰
90❰
Q2 :-An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is:
2 cm
4 cm
10 cm
22 cm
Q3 :-. A concave mirror produces a magnification of +4. The object is placed:
At the focus
Between focus and centre of curvature
Between focus and pole
Beyond the centre of curvature
Q4:-A ray of light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:
120o
90o
45o
0o
Q5 :-An object is placed at 100 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is:
Less than 100 mm
Between 100 mm and 200 mm
Exactly 200 mm
More than 200 mm
Q6:-Twinkling of stars is due to :-
Reflection of light
Refraction of light
Diffraction
All
Q7 :-The unit of power of lens is
Metre
Centimeter
Diopter
M-1
Q8 :-Focal length of plane mirror is
At infinity
Zero
Negative
None of these
Q9 :-Image formed by plane mirror is
Real and erect
Real and inverted
Virtual and erect
Virtual and inverted
Q10 :-In optics an object which has higher refractive index is called
Optically rarer
Optically denser
Optical density
Refractive index
Q11 :- Which of the following can make a parallel beam of light when light from a point source is incident on it?
Concave mirror as well as convex lens
Convex mirror as well as concave lens
Two plane mirrors placed at 90° to each other
Concave mirror as well as concave lens
Q12 :-Magnification produced by a rear view mirror fitted in vehicles
Is less than one
Is more than one
Is equal to one
Can be more than or less than one depending upon the position of the object in front of it.
Q13 :-Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?
15 cm in front of the mirror
30 cm in front of the mirror
Between 15 cm and and 30 cm in front of the mirror
More than 30 cm in front of the mirror
Q14 :-A full length image of a distant tall building can definitely be seen by using
A concave mirror
A convex mirror
A plane mirror
Both concave as well as plane mirror
Q15 :-The laws of reflection hold good for
Plane mirror only
Concave mirror only
Convex mirror only
All mirrors irrespective of their shape
Q16 :-Light travel fastest in
Water
Air
Glass
Diamond
Q17 :-Spherical mirror with reflecting surface curved inwards is called
Convex mirror
Concave mirror
Curved mirror
None of these
Q18 :-The mirror used as rear-view mirror in vehicles
Convex mirror
Plane mirror
Cylindrical mirror
Concave mirror
Q19 :-Convex lens is also known as
Converging lens
Diverging lens
Radial lens
Axial lens
Q20 :-You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?
Kerosene
Water
Mustard oil
Glycerine
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