A convex lens is used to form an image of an object on a screen. If th

1.	A convex lens is used to form an image of an object on a screen. If the upper half of the lens is blackened, so that it becomes opaque, then(a) only half of the image will be visible(b) the image position shifts towards the lens(c) the image position shifts away from the lens(d) the brightness of the image reduces
Answer» Answer is : (d) the brightness of the image reduces When a lens is cut into half or its half part is blackened, image is formed at same place but its intensity is reduced.

A convex lens is used to form an image of an object on a screen. If the upper half of the lens is blackened, so that it becomes opaque, then(a) only half of the image will be visible(b) the image position shifts towards the lens(c) the image position shifts away from the lens(d) the brightness of the image reduces

Answer»

Answer is : (d) the brightness of the image reduces

When a lens is cut into half or its half part is blackened, image is formed at same place but its intensity is reduced.

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