Question

A window is provided in the middle of a wall. Its image is obtained on the
opposite wall at a distance ‘d’ from it using a lens. If the window and its
image are of the same size, then the focal length of the lens used is 1
(A) +d/4
(B) +d/2
(C) -d/4
(D) -d/2

Answer 1

For x=0, find value of x² -5x + 5Write m³ + 3 + 5m these polynomial in standard form.

Answer 2

A window is provided in the middle of a wall. Its image is obtained on the opposite wall at a distance ‘d’ from it using a lens. If the window and its image are of the same size, then the focal length of the lens used is 1, +d/4, so, option (a) is correct.

• The focal length of a thin lens in air is determined from the lens's center to its main foci, also known as focal points.
• The focal length of a converging lens, such as a convex lens, is positive and determines the distance a collimated light beam would travel to focus on a single spot.
• Distance is an object's overall movement, regardless of direction. Regardless of an object's starting or ending point, distance can be defined as the amount of ground it has traveled.
• A lens is an opaque piece of glass or plastic joined by two surfaces, at least one curved.
• It could be curved or flat. Most often, it is curved.

A window is provided in the middle of a wall. Its image is obtained on the opposite wall at a distance ‘d’ from it using a lens. If the window and its image are of the same size, then the focal length of the lens used is 1,  +d/4. (a).

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