Double Concave Lens Characteristics
A double concave lens is a type of diverging lens. Its defining physical characteristic is its shape.
Lens Shape Analysis
- The lens surfaces curve inwards on both sides.
- This results in the lens being thinner in the middle and progressively thicker at the edges.
Optical Properties
Due to its shape, a double concave lens causes parallel light rays passing through it to spread out or diverge. It does not focus light to a single point; instead, it creates a virtual focal point from which the diverged rays appear to originate.
Conclusion
Based on its physical structure (thinner middle, thicker edges) and its effect on light (divergence), the correct description is that it is thicker at the edges and thinner in the middle, causing light rays to diverge.
Similar Questions
An object is placed at a distance of 20 cm from a convex lens of focal length 10 cm. The image is formed at a distance of:
When white light is dispersed by a glass prism into seven colours, out of the following colours which colour will be deviated the least?
- The line joining the centre of curvature and the pole of a given spherical mirror is called __________.
- A symmetrical biconvex lens of focal length '\(f\)' is cut into four identical pieces along and perpendicular to its principal axis The focal length of each of four pieces is
- Complete the statement with correct option.
In dispersion without deviation,_________________ - A thin prism $P_1$ of angle $4^\circ$ and refractive index 1.54 is combined with another thin prism $P_2$ of refractive index 1.72 to produce dispersion without deviation. The angle of $P_2$ is
When white light falls on a glass prism, it splits into seven colours. The phenomena is known as:
The magnification produced by a spherical mirror is +0.75. The image is:
The centre of the reflecting surface of a spherical mirror is a point called the _______.
- If the angle of incidence formed on a concave mirror at a point is 30 ° then the angle of reflection will be:
Important Questions from Optics
Who was the first one to use a glass prism to obtain the spectrum of sunlight?
Twinkling of stars is due to:
In which a convex mirror is used?
A. Rear View mirrors in vehicles
B. Glass windows
C. Makeup Mirror
D. Kaleidoscope
An object is placed 10 cm in front of a lens. The image formed is real, inverted and of same size as the object. What is the focal length and nature of the lens?
The power of a lens is -2.5 D. The type of lens and its focal length are respectively:
