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Write the conditions for nature of objec...

Write the conditions for nature of objects and images.

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A point object at a distance of 36 cm from a convex lens of focal length 10 cm, is moved by 10 cm in 2 sec along principal axis towards the lens. Then image will aslo change its position. a. Write the law which relates object and image distance from the lens. b. Find the inwal and final position of the image and calculate average speed of image . c. A man argues that the image will move uniformly at the same speed as that of object What is your opinion ? Justify.

An object is placed vertically at a distance of 20 cm from a convex lens. If the height of the object is 5 cm and the focal length of the lens is 10 cm, what will be the position, size and nature of the image? How much bigger will the image be as compared to the object?

An object is placed at a distance of 10 cm from a convex lens of focal length 12 cm. Find the position and nature of the image.

An object is placed on the principal axis of concave mirror of focal length 10 cm at a distance of 8.0 cm from the pole. Find the position and the nature of the image.