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Standard XII
Physics
Magnification
86.consider a...
Question
86.consider a concave mirror of focal length 20cm and x axis as the principal axis of the mirror and the pole as the origin .coordinate of the point are (-10,1,1).what are the coordinates of the image?
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Q.
The origin of
x
and
y
coordinates is the pole of a concave mirror of focal length
20
cm
. The
x-axis
is the optical axis with
x
>
0
being the rear side of mirror. A point object at the point
(
30
cm
,
1
cm
)
is moving with a velocity
10
cm/s
in positive
x-
direction. The velocity of the image in
cm/s
is approximately
Q.
An object is located at a distance
30
cm
on the principal axis from the pole of a concave mirror of focal length
20
cm
. Suddenly the mirror is displaced upwards by a distance
1.5
cm
in the direction normal to its principal axis. Calculate the displacement of the image produced by the mirror from the original axis.
Q.
A convex lens of focal length 1.5m is placed in a system of coordinate axis such that its optical centre is at origin and principal axis coinciding with the x-axis. An object and a plane mirror are arranged on the principal axis as shown in figure. Find the value of d (in m) so that y-coordinate of final image (after refraction and reflection) is 0.3m. (Take tan
θ
= 0.3)
Q.
A point object is placed at
60
cm
from the pole of a concave mirror of focal length
10
cm
on the principal axis. If the object is shifted
1
mm
towards the mirror along the principal axis, then find the shift in image.
Q.
A rod of length 10 cm lies along the principal axis of concave mirror of focal length 10 cm in such a way that
its end closer to the pole is 20 cm away from the mirror. The length of the image is then -
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