Where should an object be placed in front of convex lens of focal length 25cm to get a real image of the size of the object?

Therefore, object should be placed at a distance of 0.16 m infront of the lens.

Where should an object be placed before a convex lens of focal length 10 cm be placed to get a virtual image at a distance of 30 cm from the lens?

Answer: Explanation: In a convex lens virtual image is formed when the object is placed between pole and focus of the lens . So to obtain a virtual image at a distance of 30 cm from the lens the object must be placed between pole and focus of the lens.

What is the focal length of the convex lens if object distance is 100 cm and image distance is 25 cm from the lens?

Answer Expert Verified Therefore, f = 100/3 cm or 33.34 cm (approx.)

What type of image is formed when an object is placed at a distance of 20 cm in front of concave lens of focal length 10 cm?

When an object is placed 20 cm in front of lens ‘A’, the image is real, inverted, magnified and formed at a larger distance.

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain?

-72cm
The focal length of a convex lens, f = 18 cm. Object distance, u =? So, the object distance is -72cm. The object should be placed at a distance of -72 cm from the lens.

Where should an object be placed in front of a convex lens of focal length 10cm?

The value of the object distance is twice that of the focal length of the convex lens. So, the object is placed at 2F and the image also forms at 2F on the other side of the lens, as the image distance equals the object distance.

At what distance should an object be placed from a convex lens?

-72 cm
The object should be placed at a distance of -72 cm from the lens.

What is the focal length of a 4 diopter lens?

A 4- diopter lens brings incoming parallel rays of light to focus at 1/4 meter, it’s focal length is 1/4 meter, or 250mm.

When the object is placed at a distance of 20cm from a concave mirror of focal length 10 the image distance will be?

Thus, object distance will be –20 cm. We have, Object distance, u = –20 cm. Focal length, f = –10 cm.

What is the distance of the object formed by a lens?

A real image of an object formed by a converging lens of a focal length of 15cm is three times the of the object. What is the distance of the object from the lenses? The lens formula is 1 v − 1 u = 1 f where v, u and f are the distance of the image from the mirror , the distance of the object from the mirror and the focal length respectively.

What is the magnification of objectobject at -6/4?

Object is at -10/6 focal lengths distance from the lens so -4/6 focal lengths distance to its focal point. Then the magnification will be -6/4=-1.5 and the image will be formed 6/4 focal lengths to the right of the image-sided focal point, so 10/4=2.5 focal lengths distance to the lens. 2.5x6cm is 15cm.

Which object is placed perpendicular to the principal axis of a mirror?

A 1 cm object is placed perpendicular to the principal axis of a convex mirror of focal length 7.5 cm. Then the object should be placed infront of the mirror at a distance to get the size of the image as 0.6 cm is An illuminated object and a screen are placed 90 cm apart.