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Mirror Formula Formal Proof

25. A concave...

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25. A concave mirror of radius 40cm lies on horizontal table and water is filled in it up to height of 5 cm. A small dust particle floats on water surface vertically above the point of contact of the mirror with the table. Locate the image of the dust as seen from a point directly above it.

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Q. A concave mirror of radius

40 c m

lies on a horizontal table and water is filled in it up to a height of

5.00 c m

. A small dust particle floats on the water surface at a point

P

vertically above the point of contact of the mirror with the table. The image of the dust particle as seen from a point directly above it is

8 + \frac{a}{4} c m

. Find the value of

a

. [Use the refractive index of water is

1.33

Q. A concave mirror has radius of curvature of

40 c m

. It is at the bottom of a glass that has water filled up to

5 c m

(see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance

d

from the surface of water. The value of

d

is close to : (Refractive index of water

= 1.33

Q. A concave mirror has radius of curvature of

40 cm

. It is at the bottom of a glass that has water filled up to

5 cm

(see figure)
If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance d in cm from the surface of water. The value of d is close to

[Refractive index of water = 4/3]

Q. A concave mirror has a radius of curvature of

40 cm

. It is at the bottom of a glass that has water filled up to

5 cm

(see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance

d

from the surface of water. The value of

d

(Refractive index of water=1.33)

Q. A concave mirror is placed on a horizontal table, with its axis directed vertically upward. Let

O

be the pole of the mirror and

C

its center of curvature. A point object is placed at

C

. It has a real image, also located at

C

. If the mirror is now filled with water, the image will be

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