Question

English
ABCD shows the walls of a room
such that AD = BC = 10 m and AB =
CD = 6 m. The wall BC has a full
length plane mirror. A camera is
placed at the mid-point of the wall
AD. Now to take clear image of the
point D, the camera should be
focused at​

Answer 1

Explanation:

Figure shows the plane (top view) of a cubical room, with wall CD as a plane mirror; each side of the room is 3 metres in length. A camera P is placed at the mid point of the wall AB. At what distance should the camera be focused to photograph the image of an object placed at A?

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Solution

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To find

4F What location camera should be focused ?

Location of Image of object kept at point A will be 3m below the plane mirror.

So camera will be focused at distance =PA

PA=

(6)

2

+(

2

3

)

2

=

36+

4

9

=6.18m>6m

Answer 2

Answer:

=6.18m>6m

ok

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