What is the sign of focal length in concave and convex mirror?

The focal length of the convex mirror is positive, whereas that of the concave mirror is negative.

What is the sign of focal length of a concave mirror?

The focus of concave mirror is in front of the mirror on the left side, so the focal length of a concave mirror will be negative (and written with a minus sign, say, -10 cm).

What is the sign of focal length of convex lens?

The focal length is positive that is a convex lens. Then the focal point is real or the rays pass through the point. The negative sign denoted as the image is virtual or the rays do not pass through the image. The positive sign denotes upright image.

What is the sign of the focal length for a convex mirror?

positive
Since, the centre of curvature and focus lies behind the convex mirror, so sign of radius of curvature and focal length are taken as + (positive) in the case of convex mirror. In the case of convex mirror, image always formed behind the mirror, thus the distance of image is taken as positive.

What is the sign of U in convex lens?

u = distance of object needle from lens. v = distance of image needle from lens. Note: According to sign-convention, u has negative value and v has positive value for convex les. Hence, f comes positive.

How do you determine the focal length of a sign?

The focal length of concave mirror/convex lens is taken positive while that of convex mirror/ concave lens is taken negative. Means the focal length of convex is always positive no matter whether it is mirror or lens. The focal length of convex mirror and lens is always +. For concave it is just the opposite of convex.

What is the sign of U in concave lens?

See according to the New Cartesian Sign convention U i.e., the object distance is always in the left hand side of the lens or mirror i.e., to -X side. That is why U is always taken as negative. For focal length, f in lens is always taken as negative for concave and positive for convex.

Is focal length of concave mirror is positive or negative?

The focal length of a concave mirror is negative because the focus of a concave mirror is in front of the mirror, on the left side. Whereas, The focal length of a convex mirror is positive because the focus of a convex mirror is behind the mirror, on the right side.

What is the sign for convex lens and concave lens?

The sign convention of concave len is negative. The sign convention of convex len is positive. In case refraction through a lens if, we take the left-hand side to be positive and right-hand side to be negative, then focal length of the second surface of the lens that is is used to determine sign.

Is focal length of convex mirror is positive or negative?

What is the sign of U for convex and concave lens?

What is the sign of U?

The letter U is signed by holding up your dominant hand in a fist, facing outward, with the index & middle fingers sticking up while held together.