Given f = 15 cm. Magnification = 3. So the ie v/u = 3. So v = 3u
Using lens formula, 1/f = 1/v - 1/u
Now u = -u and v = -3u and f = 15
Plug these.
1/15 = -1/3u + 1/u
Hence u = 10 cm.
The object is to be placed at a distance of 10 cm from the lens.
تبنبنبنبخببخبولملخلمثوثهبخدخدخددنخيبخبوولندندنبميخ
-6 cm
Using
f = (uv) / (u+v)
Where u = object distance
v =image distance
f = focal lenght
30 cm
In a concave lens the object always forms a virtual image. The convex lens also forms a virtual image.
concave lens formed virtual,erect and diminished image irrespective to the distance between the object and lens.
It is only erect and virtual when it is placed between E and F.
The concave mirror focusses images to its focal point. So the images formed are real inverted and increases in size as the distance between the aperture and the object decreases. When the object is placed between the focus and the aperture the image formed is virtual erect and magnified.
A concave mirror forms a virtual, magnified, right side up image.
Your right! You see technically we see up side down but with the light we see right side up so what that means is yes it is upside down. Well, since the brain doesn't turn it "right side up" it could be either way that you look at it.
image formed by the concave lens will be erect , virtual and smaller than the size of object.
In a concave lens the object always forms a virtual image. The convex lens also forms a virtual image.
concave lens formed virtual,erect and diminished image irrespective to the distance between the object and lens.
It is only erect and virtual when it is placed between E and F.
The concave mirror focusses images to its focal point. So the images formed are real inverted and increases in size as the distance between the aperture and the object decreases. When the object is placed between the focus and the aperture the image formed is virtual erect and magnified.
A concave mirror forms a virtual, magnified, right side up image.
Image formed by a concave lens or a diverging lens is virtual,upright and smaller than the object.It is used by short sighted people.
Virtual image
Here is a description of image formation in a concave mirror: if the object is beyond the center of curvature (F), the image formed is real and upside down; if the object is very near to the concave mirror, the image forms behind the mirror. It is virtual, upright, and bigger in size. Here is a description of image formation in a convex mirror: a convex mirror always produces a virtual, upright, and smaller image of the object at any distance in front of it. The image is located behind the mirror.
The difference is that when virtual image is formed by the concave mirror...it is larger than its original size..but when it is formed by the convex mirror..it is smaller than the original size....
erect, magnified, and virtual