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Worksheets10class Reflection marathon Test
Total questions: 78
Worksheet time: 51mins
Name
Class
Date
1.
If magnification of mirror is negative the image is
a)
smaller than the object
b)
larger than the object
c)
erect
d)
inverted
2.
The negative sign in magnification indicates
a)
Image is real
b)
Image is virtul
c)
Image is inverted
d)
Image is erect
3.
The scientist who burned ships using mirrors is ____
a)
Archimedes
b)
Pierre de fermat
c)
Newton
d)
Boyle
4.
The geometrical center of curved mirror is called_____
a)
Center of curvature
b)
Pole
c)
Radius of curveture
d)
Focus
5.
The magnification is always 1 for the following mirror( convex mirror, concave mirror, plane mirror, none of these)
a)
Convex mirror
b)
Concave mirror
c)
Plane mirror
d)
None
6.
The line which pass through the center of curvature and pole is _________
a)
Axis
b)
Reflected ray
c)
Incidence ray
d)
Principal axis
7.
The distance between pole and centre of curveture is ____________
a)
Focal length
b)
Radius of curvature
c)
Objest distance
d)
Image distance
8.
The distance between focus and pole of a mirror is called _____
a)
Radius of curveture
b)
Height of the mirror
c)
Objest distance
d)
Focal length
9.
________mirror always produces virtual image
a)
Plane and convex
b)
Concave
c)
Spherical
d)
None
10.
In curved mirrors, Image distance is negative for this image
a)
real
b)
virtual
c)
erected
d)
inverted
11.
In curved mirrors image distance is possitive for ______image
a)
real
b)
virtual
c)
erected
d)
inverted
12.
In curved mirrors magnefication is possitive for ______image
a)
Real
b)
Virtual
c)
Inverted
d)
Erected
13.
In curved mirrors magnefication is ______for inverted image
a)
Possitive
b)
Negative
c)
No sign
d)
Any sign
14.
In curved mirrors the height of object and image are possitive if measured _____from the axis
a)
Upward
b)
Downward
c)
Mirror side
d)
Oppositive to mirror side
15.
In curved mirrors the height of objest and image are negative if measuresd _________from the axis
a)
Upward
b)
Downward
c)
Mirror side
d)
Oppositive to mirror side
16.
The angle between incidence ray and normal ray is called as _____
a)
angle of normal
b)
angle of reflection
c)
angle of ray
d)
angle of incidence
17.
The angle between normal and reflected ray is called
a)
angle of normal
b)
angle of reflection
c)
angle of ray
d)
angle of incidence
18.
The light ray passing througth the _________reflects back in the same path
a)
Center of curveture
b)
Focus pole
c)
Pole
d)
Radius of curveture
19.
The image that we get by extending the rays backwards is called __________
a)
virtual
b)
real
c)
diminished
d)
magnefied
20.
Which mirror has the Focus and centre of curveture at the same point
a)
Concave
b)
Convex
c)
Plane mirror
d)
No mirror
21.
When object is placed between mirror and focus, the image is _________
a)
Same size as object
b)
Diminished
c)
Highly diminished
d)
Enlarged
22.
When an object is placed on center curveture the size of image is __________
a)
same size as object
b)
diminished
c)
highly diminished
d)
enlargered
23.
The scientist who used Convex mirrors to burn ships is
a)
Newton
b)
Archimedes
c)
Pascal
d)
None
24.
It is available in every house
a)
Concave mirror
b)
Concvex mirror
c)
Plane mirror
d)
None
25.
The shaving mirrors, dentists mirrors work on, when the object is at
a)
at C
b)
in between C and F
c)
at F
d)
in between f and p
26.
An object is placed beyond the center of curvature of concave mirror then the image is
a)
Erect, Real and Enlarged
b)
Inverted, Real and Dimished
c)
Invrted, Virtual and Enlarged
d)
Erect, Virtual and Diminished
27.
R=2f is valid for
a)
plane mirrors
b)
convex lenses
c)
concave lenses
d)
both convex and concave mirrors
28.
An object is placed at 20 cm away on principal axis of a concave mirror of 15 cm focal length, image distance is
a)
-25 cm
b)
-30 cm
c)
-60 cm
d)
-5 cm
29.
The ratio of focal length of a spherical mirror to its radius of curvature is
a)
0.5
b)
1
c)
2
d)
3
30.
The ratio of radius of curvature of a spherical mirror to its focal length is
a)
0.1
b)
1
c)
2
d)
3
31.
The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/f=
a)
1/v-1/u=1/f
b)
1/v+1/u=1/f
c)
v-u=f
d)
v+u=f
32.
The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/v=
a)
1/v-1/u=1/f
b)
1/v=1/f-1/u
c)
v-u=f
d)
v+u=f
33.
The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/u=
a)
1/v-1/u=1/f
b)
v+u=f
c)
v-u=f
d)
1/u=1/f-1/v
34.
The image formed by a concave mirror is
a)
Always real
b)
Always virtual
c)
Can be both real or virtual
d)
None of these
35.
The image formed by a convex mirror is
a)
Always real
b)
Always virtual
c)
Can be both real and virtual
d)
None of these
36.
The mirror which has wide field of view is
a)
Concave mirror
b)
Convex mirror
c)
Plane mirror
d)
None of these
37.
A concave mirror always forms real image except when the object is placed
a)
at infinity
b)
between F anc C
c)
at F
d)
between F and P
38.
An object is placed at a distance of 30 cm from a concave mirror of focal length 15 cm. The image will be
a)
Real and same size
b)
Real and magnified
c)
Real and diminished
d)
Virtual and magnified
39.
Starting from a long distance an object moved towards a convex mirror. Then the image moves
a)
towards pole and decrease size
b)
towards pole and increases size
c)
away from pole and decreases size
d)
away from pole and increases size
40.
The ratio of size of the image to the size of the object is called
a)
Magnification
b)
Power
c)
Focal length
d)
Radius of curvature
41.
The laws of reflection of light are valid for
a)
Plane mirrors only
b)
Concave mirrors pnly
c)
convex mirrors only
d)
all mirrors
42.
In the case of _____ mirror magnification is always positive
a)
Concave
b)
Plane
c)
Both
d)
None
43.
In the case of _____ mirror magnification is always positive
a)
Convex
b)
Plane
c)
Both
d)
None
44.
In the case of _____ mirror magnification is negative
a)
Plane
b)
Concave
c)
Convex
d)
None
45.
Which mirror is used by dentists
a)
Concave
b)
Convex
c)
Plane
d)
None
46.
Mirror formula _________
a)
R=2f
b)
v=f+u
c)
f=v+u
d)
1/f=1/u+1/v
47.
When light reflected from a surface, the angle of incidence is 30 degrees, then angle of reflection is
a)
0
b)
60
c)
30
d)
90
48.
Which of the following images cannot be caught on screen?(Real, Virtual, Both, None)
a)
Real
b)
Virtual
c)
Both
d)
None
49.
When rays parallel to principal axis incident o concave mirror, after reflection they meet at
a)
Pole
b)
Focus
c)
Center of curvature
d)
None
50.
Magnification formula
a)
m=object height/ image height
b)
m=image height/object height
c)
m=image height/-object height
d)
m=-image hight/object height
51.
An object of size 7 cm is palced at 27 cm infront of a concave mirror of focal length 18 cm. Image distance is
a)
-54 m
b)
54 m
c)
54 cm
d)
-54 cm
52.
Which mirrors were used by Archimedes to burn enemy ships(Convex, Concave, Plane, None)
a)
Convex
b)
Concave
c)
Plane
d)
None
53.
Magnification formula
a)
v/u
b)
v/-u
c)
-v/u
d)
-u/v
54.
When an object is placed between mirror and focus, the image is formed
a)
Beyond C
b)
Behind mirror
c)
At infinity
d)
At C
55.
Where should we place the object, to get image at infinity
a)
Between F and C
b)
Beyond C
c)
Between P and F
d)
At F
56.
Where should we place the object, to get same size image but inverted
a)
At F
b)
Between F and C
c)
At C
d)
Between F and P
57.
Which mirrors are used as rear view mirrors
a)
Convex
b)
Concave
c)
Plane
d)
None
58.
Where should we place the object infront of a concave mirror to get a virtual image
a)
At F
b)
Between P and F
c)
At C
d)
Between C and F
59.
Which type of mirrors are used in headlights of vehicles?
a)
Plane
b)
Convex
c)
Concave
d)
None
60.
For which mirror the magnification is always same?
a)
Plane
b)
Convex
c)
Concave
d)
None
61.
What is the radius of curvature of a mirror if its focal length is 20 cm
a)
20 cm
b)
40 cm
c)
10 cm
d)
None
62.
In the case of _____ mirror magnification is always positive
a)
Concave
b)
Convex
c)
Both
d)
None
63.
The image formed by Convex mirror is
a)
Always Erect
b)
Always Inverted
c)
Erect or Inverted
d)
None
64.
The image formed by Concave mirror is
a)
Always Erect
b)
Always Inverted
c)
Erect or Inverted
d)
None
65.
In case of ______________ mirror magnification is always constant
a)
Concave
b)
Convex
c)
Concave and Convex
d)
Plane
66.
In case of ______________ mirror magnification is always between 0 and 1
a)
Concave
b)
Convex
c)
Concave and Convex
d)
Plane
67.
In case of ______________ mirror magnification is always between
a)
Concave
b)
Convex
c)
Concave and Convex
d)
Plane
68.
In case of ______________ mirror magnification is always +1
a)
Concave
b)
Convex
c)
Concave and Convex
d)
Plane
69.
Concave mirror is used
a)
by Dentists
b)
In car head lights
c)
In car head lights & by Dentists
d)
No answer
70.
If magnification of concave mirror is <1 , the object was placed at
a)
at C
b)
at F
c)
between C and F
d)
beyond C
71.
If reflected ray passes parellel to the principal axis of a concave mirror, how does the light ray falls on rhe mirror
a)
Parallel to Principal axis
b)
Passes through Focus
c)
Passes through Center of curvature
d)
Passes through Pole
72.
If we place an object at 30cm distance infront of concave mirror of 20 cm focal length, then where does image form
a)
20 cm
b)
30 cm
c)
40 cm
d)
beyond 40 cm
73.
Image height formed by a concave mirror is 6cm, height of object is 4cm and image distance is 37.5cm object distance
a)
15cm
b)
25cm
c)
30cm
d)
37.5cm
74.
The distance from real object to a real image is zero then the position of object is
a)
at C
b)
at F
c)
between C and F
d)
beyond C
75.
The point at which reflected rays convrges or diverges by a curved mirror is
a)
Pole
b)
Center of curvature
c)
Focus
d)
No answer
76.
To get diminished,inverted,real image by a concave mirror of 10 cm focal length we place object at….cm
a)
5
b)
10
c)
15
d)
25
77.
When we place an object between P and F of a concave mirror, the hight of the image consider as….
a)
Positive
b)
Negative
c)
Positive or Negative
d)
Neither positive nor negative
78.
Which formula is right for a concave mirror
a)
1/f=uv/u+v
b)
f=uv/(u+v)
c)
f=uv/u-v
d)
1/f=1/u-1/v
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