"OM Sai Ram"
"Er.Shyam Pachori Science Classes"
Test
of Reflection
Class X
Time 40 Min
Max Marks:20
Note: Each Questions Carry two marks.
Q.1 In what way is the word
AMBULANCE painted in front of the hospital vans? Why is it painted this way?
Q.2 A concave mirror and convex
lens are held in water. What change, if any, do you expect to find in the focal
length of either?
Q. 3 ‘ Vehicles in this mirror
are closer than they appear’. This warning is printed on the convex mirror
outside the driver’s side of a vehicle. What is the reason for this warning?
Q.4 How many images are seen when
two mirrors are placed in parallel?
Q.5 Find the position, nature and size of image of an object 4cm high
placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
Q.6 An object is placed at a distance of 25 cm from the pole of a
spherical mirror which forms a real, inverted image on the same side of object
at 37.5 cm from the pole. Calculate the focal length of mirror and find nature
of the mirror.
Q.7 Find the position of an object which when placed in front of a
concave mirror of focal length 20 cm produces a virtual image, which is twice
the size of the object.
Q.8. In torches, search
lights and head lights of vehicles the bulb is placed
(a) Between pole and
focus
(b) Very near to the focus
(c) Between focus and
centre of curvature
(d) At centre of
curvature
Q.9 An object is kept at a distance of 15cm from
a
(1) convex mirror
(2) concave mirror
(3) Plane mirror.
The focal length of the
convex mirror and the concave lens are 10 cm each.
Draw the appropriate ray
diagrams, showing the formation of image, is each of
the three cases.
Q.10 What does this
signify
(a) m = +1
(b) m = -- 1
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