State and define the SI unit of power of a lens.
Download our app for free and get started
The power of the lens is the reciprocal of the focal length of the lens. The SI unit of the power is diopter. it is denoted by D.
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 SolutionWhat is the position of the image when an object is placed at a distance of 20cm from a concave mirror of focal length 20cm?
- 2View SolutionDraw ray diagrams showing the image formation by a concave mirror when an object is placed:At infinity.
- 3View SolutionHow is the reflection of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass?
- 4View SolutionHow could you find the focal length of a convex lens rapidly but approximately?
- 5View SolutionDraw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.
- 6What is the speed of light in a medium of refractive index $\frac{6}{5}$ if its speed in air is 3,00,000 km/ s?View Solution
- 7View SolutionDraw ray diagrams showing the image formation by a convex lens when an object is placed:
At the focus of the lens. - 8View SolutionDoes the incident and emergent ray coincide in the process of refraction through glass slab? Give reason.
- 9View SolutionLight travels more quickly through water than through glass:
- Which is optically denser: Water or glass?
- If a ray of light passes from glass into water, which way will it bend: Towards the normal or away from the normal?
- 10View SolutionDraw a ray diagram to show the formation of a real diminished image of an object by a convex lens. In your diagram, the position of object and image with respect to the principal focus should be shown clearly.