46. Which of the following is not an application of plane mirros?
a. Elevator mirrors
b. Periscope
c. Kaleidoscope
d. Solar Cooker
47. How will you describe the appearance of image as it comes nearer to a convex lens?
a. the image appears farther and magnified c. the image appears nearer and magnified
b. the image appears farther and diminished d. there will be no image
48. What would be the orientation of an object if it's located beyond 2F of a convex lens?
a. Upright
b. Inverted
c. Sideward
d. No Image
49. What kind of mirror is used in automobiles to give the driver a wider area and smaller image of
trattic behind him?
a. Plane mirror b. Concave mirror c. Convex mirror d. None of these
50. Which of the following does not describe real image?
a. A real image is formed when light rays actually meet after reflection
b. A real image can be formed on a screen.
c. A real image is inverted with respect to the object.
d. A virtual image is erect with respect to the object.

They are used as looking glass.
They are used in solar cookers.
They are also used in constructing periscope which is used in submarines.
They are also used to make kaleidoscope, a toy which produces beautiful patterns.
They are also used in various scientific instruments

47. The object changes when it comes nearer the concave lens. The forming image is always at the place between the f and 2f. That is why it is being reduced. While the convex lens creates the opposite one

48. If the object is placed between 2F and F, the image will appear beyond 2F on the other side. The image will be real, inverted, and enlarged. For convex lenses, when the object is placed inside F, the image will be on the same side of the lens as the object and it will be virtual, upright, and enlarged.

49.Convex Mirror

Answer: A kind of mirror that used in automobile and trucks to give the driver a wider area and smaller image of the traffic behind him/her is the Convex Mirror

50. an image is defined as the collection of focus points of light rays coming from an object. A real image is the collection of focus points actually made by converging rays, while a virtual image is the collection of focus points made by extensions of diverging rays. In other words, it is an image which is located in the plane of convergence for the light rays that originate from a given object. Examples of real images include an image on a cinema screen (the source being the projector, and the screen plays as a diffusely reflecting surface so the image formed on the screen plays as an object to be imaged by human eyes), the image produced on a detector in the rear of a camera, and the image produced on an eyeball retina (the camera and eye focus light through an internal convex lens). Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point, and this real image is inverted.

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