At what distance should an object be placed from a convex lens of focal length 10cm?

Calculate the distance at which an object should be placed in front of a convex lens of focal length 10 cm to obtain a virtual image of double its size. Here, u=?,f=10cm,m=+2, as image is virtual. Therefore, object should be placed at a distance of 5 cm from the lens.

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.

At what distance should an object be placed from a convex lens of focal length 15 cm?

At what distance should an object be placed from a convex lens of focal length 15 cm to obtain an image three times the size of the object? [Ans. at 20 cm (for real image), at 10 cm (for virtual image)]

What should be the distance of an object from a convex lens of focal length 20cm so as to obtain an image twice the size of the object?

Thus, the object should be placed at a distance of 40 cm in front of the convex lens. …

How far should an object be placed from a convex lens?

An object should be placed at distance 60 cm from the convex lens.

At what distance should an object be placed in front of a convex lens?

Minimum distance between an object and itsreal image produced by a convex lens is 4f(f is focal length of convex lens)

At what distance should an object be placed from a convex lens of focal length 16 cm to obtain an image three times the size of the object?

Using lens formula to find the position of object u. Therefore the object must be placed at a distance of 72 cm from the focal length of the lens.

At what distance should an object be placed from a convex lens of focal length 15cm to obtain a virtual image at 30 cm from it?

Substitute f=−30cm and v=−15cm to find the value of u. Substitute, v=−15cm, u=−30cm and h1=5cm to find the value of h2. Therefore, the object should be placed 30 cm from the optical centre and the size of the image formed is 2.5 cm.

What should be the distance of an object from a convex lens?

At what distance from a convex lens should an object be placed on the axis so as to form a real image of the same size Illustrate your answer with a diagram?

Object should be placed at 2F (ie 40 cm) distance from the optical centre of the lens.

How far should an object be placed from a convex lens of focal length 20cm to obtain its image at a distance of 90cm from the object?

Object should be place at a distance of 60 cm on the left side of the convex lens.

What distance should an object be placed from a convex lens?

Originally Answered: At what distance should an object be placed from a convex lens of focal length 15 cm to obtain an image three times the size of the object? There are 2 answers; one is 20 cm answered by Hussnain below which corresponds to a real, inverted image at 60 cm behind the lens.

What is the focal length of a 6-cm high object?

A 6-cm high object is placed 6 cm from an 18-cm focal length. Find out the image distance, the magnification of the image, the image height and the properties of the image. The focal length is positive that is a convex lens.

Can convex lenses be used to produce a real image?

A convex lens can be used to produce a real image, and this occurs if the object is located at a position of more than one focal length from the lens. It is projected in front of the lens and can be captured on a screen.

What is the magnification of the object on the lens?

If the object is on the focal point (distance zero), the magnification is 1/0=inf. If it is one focal length farther left, the magnification is 1/ (-1) = -1. If it is one focal length to the right, it sits on the lens and the magnification is 1/1 = 1.