Is distance is always negative?
Detailed Solution. The object distance is always negative in optical distances according to sign convention rules. A convex lens bulges out on the source of light. According to the Cartesian sign convention, the left and the bottom of origin point (0,0) would be negative.
Can an object distance be negative?
Explanation: Object distance is always negative as per the sign conventions. If you want to ask for image distance then yes image distance can be negative for convex lens. Such an image is produced when the object is kept at a distance less than the focal length of the lens.
Why the object distance of concave mirror is negative?
Since, object is always placed in front of the mirror hence the sign of object is taken as negative. Since, the centre of curvature and focus lie in front of the concave mirror, so signs of radius of curvature and focal length are taken as negative in the case of concave mirror.
Why is the value of an object’s distance always negative in mirror equation?
Answer: the value of distance of object is negative in mirror equation. This is because of the sign convention. as per the sign convention the value of image always be negative .
Is object distance negative in concave lens?
A concave lens diverges the rays incident on it. So the image will be formed behind the lens. So the image distance becomes negative. (The image distance is measured from the principal point to the point at which the image is formed.)
Why does a concave lens have a negative focal length?
The power of the lens is the reciprocal of the focal length. 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.
What happens if the distance is negative?
Distance cannot be negative, and never decreases. Distance is a scalar quantity, or a magnitude, whereas displacement is a vector quantity with both magnitude and direction.
Is image distance positive or negative?
focal length | image distance | |
---|---|---|
converging lens | positive | positive, if on the opposite side as object (real) negative, if on the same side as object (virtual) |
diverging lens | negative | negative,as all images are virtual and on the same side as object (virtual) |