An object is placed at a distance of 12cm in front of a concave mirror of radius of curvature 30cm. List four characteristics of the image formed by the mirror.
CBSE DELHI - SET 3 2017
Download our app for free and get started
Here u = -20cm, f = +15cm, v = ? Using mirror formula, we have,$\frac{1}{\text{v}}+\frac{1}{\text{u}}=\frac{1}{\text{f}}$
$\frac{1}{\text{v}}-\frac{1}{20}=\frac{1}{15}$
$\frac{1}{\text{v}}=\frac{1}{15}+\frac{1}{20}$
$\frac{1}{\text{v}}=\frac{4+3}{60}$
$\text{v}=\frac{60}{7}=8.5\text{cm}$
Therefore, the image formed behind the mirror and forms virtual, erect, diminished, image.
$\frac{1}{\text{v}}-\frac{1}{20}=\frac{1}{15}$
$\frac{1}{\text{v}}=\frac{1}{15}+\frac{1}{20}$
$\frac{1}{\text{v}}=\frac{4+3}{60}$
$\text{v}=\frac{60}{7}=8.5\text{cm}$
Therefore, the image formed behind the mirror and forms virtual, erect, diminished, image.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionIf the magnification of an image formed by a mirror is positive, what does it mean?
- 2View SolutionDraw a ray diagram to show the path of the reflected ray corresponding to an incident ray which is directed parallel to the principal axis of a convex mirror. Mark on it the angle of incident and the angle of reflection.
- 3View SolutionDraw ray diagrams showing the image formation by a concave lens when an object is placed:Between focus and twice the focal length of the lens.
- 4View SolutionWhat do you understand by the power of a lens? Name one factor on which the power of a lens depends.
- 5View SolutionState two positions in which a concave mirror produces a magnified image of a given object. List two differences between the two images.
- 6View SolutionList two possible ways in which a concave mirror can produce a magnified image of an object placed in front of it. State the difference, if any, between these two images.
- 7View SolutionAn object of height 2.5cm is placed at a distance of 15cm from the optical centre ‘O' of a convex lens of focal length 10cm. Draw a ray diagram to find the position and size of the image formed. Mark optical centre ‘O', principal focus F and height of the image on the diagram.
- 8View SolutionExplain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface.
- 9Redraw the following diagram on your answer-sheet and show the path of the reflected ray. Also mark the angle of incidence $(\angle\text{i})$ and the angle of reflection $(\angle\text{r})$ on the diagram.View Solution
- 10View SolutionDefine:
- Principal focus of a concave mirror.
- Focal length of a concave mirror.