The boy walks towards the mirror at a speed of 1m/ s. At what speed does his image approach him?
Download our app for free and get started
When the boy walks towards the mirror at a speed of 1m/ s, his image will also appear to move towards the mirror at the same speed of 1m/ s. So, the speed at which his image approach him will be 2m/ s + 2m/ s = 4m/ s.
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 SolutionDraw ray diagrams showing the image formation by a convex mirror when an object is placed:
At finite distance from the mirror. - 2View SolutionA large concave mirror has a radius of curvature of 1.5m. A person stands 10m in front of the mirror. Where is the person’s image?
- 3View SolutionA doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
- 4View SolutionA convex lens of power 5D and a concave lens of power 7.5D are placed in contact with each other. What is the:
- Power of this combination of lenses?
- Focal length of this combination of lenses?
- 5View SolutionExplain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface.
- 6View SolutionAn object is placed at the following distance from a convex lens of focal length 15cm:
- 35cm
- 30cm
- 20cm
- 10cm
- A magnified real image?
- A magnified virtual image?
- A diminished real image?
- An image of same size as the object?
- 7View SolutionIdentify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.
Object is placed between device and its focus, image formed is enlarged and behind it. - 8View SolutionDraw ray diagrams showing the image formation by a convex lens when an object is placed:
Between optical centre and focus of the lens. - 9The absolute refractive indices of glass and water are $4 / 3$ and $3 / 2$ respectively. If the speed of light in glass is $2 \times 10^8$ $m / s$, calculate the speed of light in (i) vacuum, (ii) water.View Solution
- 10View SolutionDraw ray diagrams showing the image formation by a concave mirror when an object is placed:
At centre of curvature of the mirror.