Is object distance negative in concave mirror?
object distance is always negative for all the lens & mirrors. image distance depends on object distance in case of concave mirror and convex lens. ‘v’ is always positive for convex mirror & concave lens.
What is the sign of image distance of a concave mirror?
When image is formed in front of the mirror, the distance of image is taken as – (negative) and when image is formed behind the mirror, the distance of image is taken as + (positive). Height of image is taken as positive in the case of erect image and taken as negative in the case of inverted image.
Is V positive in convex mirror?
(c) Image distances (v) for a convex mirror is always positive because the image is always formed behind the mirror.
What is U in Lens formula?
Lens Formula for Concave Lens and Convex Lens In this equation, f is the focal length of the lens, while v refers to the distance of the formed image from the lens’ optical centre. Lastly, u is the distance between an object and this lens’ optical centre. This is the lens equation for convex lenses.
What is the mirror formula for curved mirrors?
1/f= 1/u + 1/v. This equation is referred to as the mirror formula….REFLECTION AT CURVED SURFACES.
| Position of the object | Image formation by concave mirror | Image formation by convex mirror |
|---|---|---|
| Object between F and P | Image formed is virtual, upright and magnified. | Image formed is virtual, upright and diminished. |
What is Mirror formula in physics?
A mirror formula can be defined as the formula which gives the relationship between the distance of object ‘u’, the distance of image ‘v’, and the focal length of the mirror ‘f’.
What are assumptions of mirror formula?
Assumptions and Sign conventions Object should be placed on the principal axis in the form of point object. All distances are measured from the pole of the mirror. The distances of the real object and real images are taken as positive whereas that of virtual objects and images are taken negative.