At what distance should an object be placed from a convex lens of focal length 12 cm to obtain an image of 24 cm from it what will be the magnification produced in this case?

At what distance should an object be placed from a convex lens of focal length 12 cm to obtain an image of 24 cm from it what will be the magnification produced in this case?

Solution. T the object should be placed at a distance of 72 cm from the lens.

How far should an object be placed from convex lens?

Object distance from convex lens and height of the image. An object should be placed at distance 60 cm from the convex lens.

How far should an object be placed from the focal length?

The object should be placed 100 cm to the left of the mirror.

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image of 36 cm?

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 24 cm from it on the other side. what will be the magnification produced in this case? Therefore the magnification= -1/3. The image formed in the convex lens is inverted, real and diminished.

What distance from a convex lens is focal length 18 cm?

1f=1v+1u where f is the focal length of the mirror. Thus object is placed at distance 18 cm to the left of the mirror. Or, v=9cm.

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image of 24 cm?

Therefore the object must be placed at a distance of 72 cm from the focal length of the lens.

What is focal length of convex lens?

The distance between optical centre O of lens to focal point F is called the focal length of convex lens. Similarly, for concave lens or divering lens, parallel rays coming from one side of lens are getting diverged. on other side and appears on other side that they are coming from a point F .

At what distance should an object be placed from a lens of focal length 25 cm?

Focal length f = 25 cm, Image distance u = 50 cm. The object must be placed 50 cm away from the lens on the other side to produce a magnification of -1.

What is the distance and magnification of the object if image formed on a screen is 50 cm from the lens of focal length 25 cm?

Answer. Given that, Focal length, f = 25 cm Image distance, v = 50 cm Form the lens formula, Or, u = −50 cm Magnification, The object must be placed 50 cm away from the lens, on the other side to produce a magnification of −1.

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

Here, u=?,f=10cm,m=+2, as image is virtual. Therefore, object should be placed at a distance of 5 cm from the lens. A concave mirror produces three times magnified real image of an object placed at 10 cm in front of it.

At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of image is equal to the size of the object?

Solution. The size of the image is equal to the size of the object if the object is placed at the centre of curvature of a concave mirror. Hence, the object should be placed at 50 cm.

At what distance from a concave mirror of focal length 25 cm should an object?

Answer Expert Verified We can Says that ,if object is Equal to image , For which that distance will be double to it’s focal Length. Therefore, the object Distance should be 50 Cm from the pole of the mirror.

At what distance from a concave mirror and object should be placed to get an image half the size of the object?

The object should be placed 10 cm in front of the concave mirror to obtain an image which is virtual and double the size of the object.

Which mirror produces real image for real?

Solution: Concave mirrors can form real images. Convex and plane mirrors always form virtual images.

At what distance from a concave mirror of focal length 30 cm should an object placed so that the size of the image is equal to the size of the object?

Answer. Explanation: Thus, the screen should be placed at 30 cm in front of the mirror so as to obtain the real image. The image formed is real, inverted and is of the same size as the object.

Where is the image located If an object is 30cm in front of concave mirror with a focal length of 20 cm?

Answer. The final answer would be negative since, the image type would be virtual. The sign of of the value of the focal length was changed to negative (-) since the mirror used was a CONVEX mirror. The location of the image is between the focal point(F) and the vertex(V).

Which position of an object can be used to find the focal length of a concave mirror?

To determine focal length of a given concave mirror The concave mirror placed on the mirror stand and the distant object should be facing each other. The screen should be placed in front of the reflecting surface of the mirror.

What is focal length in concave mirror?

Focal length – Focal length of the concave mirror is the distance between the pole P of concave mirror and the focus F. By obtaining the Real image of the distant object, the focal length of concave mirror can be determined, as shown in the diagram.

Is Focal length of concave lens positive?

A concave lens is a diverging lens, so it will always have a negative focal length. Therefore, the power of a concave lens is also negative.

Is the focal lens of a concave lens negative or positive?

The distance from the lens to the focal point is called the focal length. For converging lenses, the focal length is always positive, while diverging lenses always have negative focal lengths.

Why is focal length positive in convex lens?

Convex lens converges incident rays. Hence the rays to converge at a point in front of the lens. So image distance is positive here. We can easily clarify that the focal length is positive direction for a Convex lens while negative with concave lens.