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Free download in PDF Reflection and Refraction of Light multiple choice questions(mcqs) and answers. These objective type questions on Reflection and Refraction of Light are very impoirtant for competitive exams like IIT-JEE, NEET, AIIMS and other Pre Medical as well as engineering exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Focal length of plane mirror is
[A]
At infinity
[B]
Zero
[C]
Negative
[D]
None of these
(2)
Image formed by plane mirror is
[A]
Real and erect
[B]
Real and inverted
[C]
Virtual and erect
[D]
Virtual and inverted
Answer: Virtual and erect
(3)
A concave mirror gives real, inverted and same size image if the object is placed
[A]
At F
[B]
At infinity
[C]
At C
[D]
Beyond C
(4)
Power of the lens is -40, its focal length is
[A]
4m
[B]
-40m
[C]
-0.25m
[D]
-25m
(5)
A concave mirror gives virtual, refract and enlarged image of the object but image of smaller size than the size of the object is
[A]
At infinity
[B]
Between F and C
[C]
Between P and F
[D]
At E
(6)
We can see objects because of_______
[A]
reflection
[B]
refraction
[C]
transmission
[D]
diffraction
(7)
Convex lens focus a real, point sized image at focus, the object is placed
[A]
At focus
[B]
Between F and 2F
[C]
At infinity
[D]
At 2F
(8)
The unit of power of lens is
[A]
Metre
[B]
Centimeter
[C]
Diopter
[D]
M-1
(9)
The refractive index of a rarer medium with respect to a denser medium is...
[A]
1
[B]
Greater Than 1
[C]
Smaller Than 1
[D]
Negative
(10)
The radius of curvature of a mirror is 20cm the focal length is
[A]
20cm
[B]
10cm
[C]
40cm
[D]
5cm
(11)
The refractive index of a denser medium with respect to a rarer medium is...
[A]
1
[B]
Greater Than 1
[C]
Smaller Than 1
[D]
Negative
(12)
A boy is standing at a distance of 2 m in front of a plane mirror.The distance between the boy and his image is ________ m.
(13)
The incident ray passing through the focus(F) of a mirror ______ after reflection.
[A]
Passes Through C
[B]
Passes Through F
[C]
Becomes Parallel To The Principal Axis
[D]
Passes Through The Pole
Answer: Becomes Parallel To The Principal Axis
(14)
The optical phenomena, twinkling of stars, is due to
[A]
Atmospheric reflection
[B]
Total reflection
[C]
Atmospheric refraction
[D]
Total refraction
Answer: Atmospheric refraction
(15)
In optics an object which has higher refractive index is called
[A]
Optically rarer
[B]
Optically denser
[C]
Optical density
[D]
Refractive index
(16)
Which of the following is a true statement?
[A]
The power of a lens is always positive
[B]
The power of a lens is always negative
[C]
The power of a convex lens is positive
[D]
The power of a concave lens is positive
Answer: The power of a convex lens is positive
(17)
Absolute refractive index of any medium is always _______.
[A]
1
[B]
> 1
[C]
< 1
[D]
0
(18)
According to the sign convention, the distance of object...
[A]
Is always positive
[B]
Is always negative
[C]
May be positive or negative
[D]
Is equal to object height
Answer: Is always negative
(19)
If magnification is +1.5, the image is______.
[A]
Erect
[B]
Diminished
[C]
Real
[D]
Inverted
(20)
The speed of light is_______ in vacuum.
[A]
3 x 105 m/s
[B]
3 x 108 m/s
[C]
3 x 108 km/s
[D]
3 x 106 m/s
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