What is the power of the lens of focal length 50 cm?

Answer: The power of a lens is 1/focal length (measured in meters). So, 50 cm is 1/2 meter, so the power is -2; D stands for diopters, the unit of power for lenses. Hence, the power of a concave lens of focal length 50 cm is -2D.

What will be the power of a convex lens of focal length 50 cm What is the lens is concave?

P (in cms)=100f=10050=2D, where p is the power of lens, f is the focal length in centimeters, D is the unit of optical power called dioptre. A convex lens of focal length 0.5m and concave lens of focal length 1m are combined. The power of the resulting lens will be.

What is the power in dioptre of a convex lens of focal length 500cm?

Answer: POWER = 1/F (metres) » POWER = 100 / -75 = -(4/3) = 1.33 DIOPTRES.

What is the power of a convex lens of focal length 80 cm?

∴ p = 1 80 × 10 2 = 100 80 = 1.25 D .

What is the focal length of lens whose power is 1.5 D?

Find the focal length of the lens. Is the prescribed lens diverging or converging? = 1/+1.5 = 0.67 m.

What is the power of concave lens of focal length 150 cm?

Hence P=1/1.50 m this is = +1.5D.

What is the focal length of a lens of power 2.0 D?

Focal length of the lens is -50cm or 0.5m.

How do you calculate power in dioptre?

The diopter is the unit of measure for the refractive power of a lens. The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. Lens surface power can be found with the index of refraction and radius of curvature.

What is the power of a lens of focal length 25 cm?

In this question it is given that the lens is convex, and its focal length is $25$ cm. First we will convert the focal length in meters. As it is a convex lens so its power is positive. Thus, the power of the lens is $+ 4D$.

What is the focal length of a mirror whose radius of curvature is 50 cm?

From R=2f=2×50=100cm.

What is the focal length of convex lens?

The focal length of convex lens is 50 cm, its power is 1. A ray of light strikes a transparent rectangular slab of refractive index 2 at an angle of incidence of 45 ∘. The angle between the reflected and refracted rays is 2. A screen is placed 90 c m away from an object.

What is the principal axis of a convex lens?

The principal axis of a convex lens is along x-axis. The coordinates of a point object and its image are (-20 cm, 2 cm) and (25 cm, -4 cm) respectively. The focal length of lens is

What is the power of the lens?

Power of Lens: The inverse of the focal length is known as the power of the lens. It shows the bending strength for the light ray of the lens. The unit of power of a lens is Dioptre when the focal length of the lens is taken in meter (m). where P is the power of the lens and f is the focal length of the lens.

Which lens has a refracting surface that is upside down?

Convex lens: The lens whose refracting surface is upside is called a convex lens. The convex lens is also called a converging lens. The focal length of a convex lens is positive.