Light Test - 25...

A candle is placed in front of an optical instrument, and an image is obtained as erect, virtual, and reversed from left to right. Identify the device that would produce the types of images described above.

Distance between an object and plane mirror is 100cm. Find the distance between the object and its image.

Mirrors on the outside of the passenger side of the cars often contain a message that says something like. "Objects are closer than they appear." In the other words, the images seen in the mirror, although looking like the objects in other respects, appear to be further away than they actually are, because the images are the smaller than the objects.
What kind of mirror is being used in this case? 

Where should the object be placed to get the virtual image in case of convex lens?

Where should the object be placed if we use convex lens to obtain real, inverted and diminished image?

An object O is placed in front of a mirror. Which is possible position of the image?

The words UNIFIED are flashed infront of mirror. Which set of alphabets on laterally inversion seem to appear differently?

Which objects use the reflection of light?

Two mirrors(facing each other) and an object O are placed in the grid as shown. At which positions(s) can the virtual image of object O be formed?

For a concave mirror, whenever the distance of the object is less than the focal length, the image is virtual. That is called virtual image, because