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# a virtual image cannot be focused on a screen . Yet when we see a virtual image,we obviously bring it to the screen that is the retina of our eyes. is this a contradiction?

Asked by siddhi.nigam 8th September 2015, 5:18 PM

Hi Siddhi,

No it is not a contradiction.

If you understand and visualize carefully then you can only see a virtual image from your eye if you are directly behind the lens or the mirror.

Suppose a convex lens is forming a virtual image, then you will not be able to project that image. But, if you stand directly behind the lens then the light passing through lens meets your eye and forms a real image on the retina.

So, you get a feeling that you are seeing a virtual image or projecting a virtual image on the screen/retina.

However, this is not the case.

Answered by Expert 9th September 2015, 6:06 PM

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## The rain water from a roof 22 m × 20 m drains into a conical vessel having a base of diameter 2 m and height 3.5 cm. If the vessel is just full, find the rainfall in mm.

Asked by shailesh.solanki 18th March 2018, 7:37 PM

## The rain water from a roof 22 m × 20 m drains into a conical vessel having a base of diameter 2 m and height 3.5 cm. If the vessel is just full, find the rainfall in mm.

Asked by shailesh.solanki 18th March 2018, 7:35 PM

## A wooden toy was made by scooping out a hemisphere of same radius from each end of a solid cylinder. If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm, find the volume of wood in the toy. Use pie=22/7

Asked by shailesh.solanki 18th March 2018, 7:34 PM