What is the radius of curvature of a double convex lens made of glass of refractive?
A double convex lens made of glass has both radii of curvature of magnitude 20 cm. Incident light rays parallel to the axis of the lens will converge at a distance at. [Given refractive index of glass = 1.5 ]
What is the focal length of a double convex lens with a radius of curvature 18cm if the refractive index of the glass with respect to the air is 5 2?
Answer: The focal length of a double convex length is 50 cm.
How do you find the refractive index of a double convex lens?
1 Answer
- n=1.5. The focal length is.
- f=5cm. The radius of curvatures are.
- r=r1=−r2. Apply the thin lens approximation. 1f=(n−1)(1r1−1r2)=(n−1)(2r) Therefore, 15=(1.5−1)⋅2r.
What is the radius of curvature of a double convex lens?
The radii of curvature of the surfaces of a double convex lens are 20 cm and 40 cm respectively, and its focal length is 20 cm.
What is a double convex lens?
Bi-Convex (Double-Convex) lenses have the same radius of curvature on both sides of the lens and function similarly to plano-convex lenses by focusing parallel rays of light to a single point. Bi-Convex lenses are the best choice when the object and image are at equal or near equal distance from the lens.
What distance from a convex lens is focal length 30cm?
hence, object distance also 60cm but left side of convex lens .
How do you find the focal length of a double convex lens?
- 50 cm. B.
- 60 cm. C.
- 90 cm. D.
- 30 cm. Medium. Solution. Verified by Toppr. Correct option is B) R1 = 60 cm, R2 = -60 cm, n = 1.5. [∵ For a double convex lens, R2=−1R1] ∴f1=(n−1)[R1−R21] ⇒f1=(1. 5−1)[601+601] ⇒f1=0. 5×602=0. 5×301=601. ⇒ f= 60 cm. Solve any question of Ray Optics and Optical Instrument with:- Patterns of problems. >
What does a double convex lens do?
A double convex lens, or converging lens, focuses the diverging, or blurred, light rays from a distant object by refracting (bending) the rays twice.
What is the radius of curvature of double convex lens made of glass of refractive index 1.55 if its focal length is 20 cm?
22 cm
A double convex lens is made of glass of refractive index 1.55 with both faces of same radius of curvature. Find the radius of curvature required, if focal length is 20 cm. Hence, the radius of curvature of the double-convex lens is 22 cm.
What is the focal length of a double concave lens with a radius of curvature 20 cm if the refractive index of the glass with respect to the air is 5 3?
The correct answer is 50 cm.
What is a double concave lens?
Bi-Concave (Double-Concave) lenses have equal radius of curvature on both sides of the lens and function similarly to plano-concave lenses by causing collimated incident light to diverge.
Which is convex lens?
A convex lens is also known as a converging lens. A converging lens is a lens that converges rays of light that are traveling parallel to its principal axis. They can be identified by their shape which is relatively thick across the middle and thin at the upper and lower edges.
What is the refractive index of a double convex lens?
A double convex lens is made of the glass of a refractive index that is 1.55 with both the faces of the same radius of curvature. What is the radius of the curvature required if the focal length is 20cm?
What is a double convex lens made of?
A double convex lens is made of glass of refractive index `1.55` with both faces of same radius – YouTube A double convex lens is made of glass of refractive index `1.55` with both faces of same radius If playback doesn’t begin shortly, try restarting your device.
What is the liquid inside a glass lens?
The liquid is water. What is the focal length of a glass lens with a convex surface of a radius of 12cm and a concave surface of radius 8cm if the refractive of the glass is 1.55? What is the focal length of a glass lens with a convex surface of a radius of 12 cm and a concave surface of radius 8 cm if the refractive index of glass is 1.55?