How do you find the distance of an image in a concave mirror?
- The mirror formula is 1f=1v+1u.
- The magnification m is given by m=−vu.
- According to sign conventions, for a concave mirror, the focal length (f) is negative, the object distance (u) is negative, the image distance (v) is positive for a virtual image and negative for a real image.
How do you graph a concave mirror?
Pick a point on the top of the object and draw two incident rays traveling towards the mirror. Using a straight edge, accurately draw one ray so that it passes exactly through the focal point on the way to the mirror. Draw the second ray such that it travels exactly parallel to the principal axis.
What is the equation of concave mirror?
The mirror equation 1v+1u=1f 1 v + 1 u = 1 f holds good for concave mirrors as well as convex mirrors.
How do you find the distance of an object from a mirror?
Let u and v be the distance of the object and image from the mirror. Magnification of image is equal to distance of image by distance of object from mirror. v=2×u=−30cm. Then, the distance of the object from the mirror is 15cm and distance of image from mirror is 30cm.
How do you find the distance of the image from the object?
You can use this formula to find distance from image using the formula, m= -v/u = hi/ho.
How do you find the focal length of a concave mirror?
By obtaining the Real image of a distant object at its focus, the focal length of the concave mirror can be estimated as shown in the diagram. The focal length of the convex mirror is positive, whereas that of the concave mirror is negative. The same can also be proved by using the mirror formula: (1/f = 1/v +1/u).
What is the formula to calculate mirror?
Let’s explore the mirror formula (1/f = 1/v+1/u) and see how to locate images without drawing any ray diagrams.
How do you calculate image distance and object distance?
Procedure
- Place the convex lens on a lens holder, placing the screen on the other side of the lens.
- Try focusing the image to get a sharp, clear and inverted image on the screen.
- The position at which the lens is fixed, mark it as O.
- Once the focal length is calculated, mark point F on both the sides of the lens.
What is the image distance in concave lens?
question_answer Answers(3)
| Object distance | Image distance | |
|---|---|---|
| Convex lens | ‘ – ‘ ve | ‘ + ‘ ve |
| Concave lens | ‘ – ‘ ve | ‘ – ‘ ve |
How do you calculate image distance?
If you know the focal length and object distance, using the above formula image distance can be calculated. otherwise, if you the magnification produced by the lens, along with focal length then also you can calculate the image distance using the formula, m= -v/u = hi/ho. where hi is the height of the image and. ho is the height of the object.
What is the focal point of a convex mirror?
The focal point of the convex mirror lies behind the mirror, wheres in the case of concave mirror the focal point lies in front of the mirror. Convex mirror is also called as a diverging mirror as the light beam arising from the same source will reflect and diverge.
What is the mirror equation?
Mirror formula is the relationship between object distance (u), image distance (v) and focal length. The mirror formula for concave mirror: 1/f=1/v+1/u.
What is focal length mirror?
The focal length of the mirror is simply the distance between and . As is easily demonstrated, in the paraxial approximation, the focal length of a convex mirror is half of its radius of curvature.