0
One common method is to use the lens formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. By measuring these distances and plugging them into the formula, you can calculate the focal length of the lens. Alternatively, you can use a lens positioning system to determine the position of the focused image, which can also help you find the focal length.
Add your answer:
Earn +20 pts
Will focal length of a concave mirror would increase decrease stay the same if the mirror were made flatter?
If a concave mirror is made flatter, its focal length will increase. This is because a flatter mirror has a larger radius of curvature, resulting in light rays converging at a point farther away from the mirror.
Sum of focal length and radius of curvuture is 30cmWhat is the focal length of this spherical mirror?
If the sum of the focal length and radius of curvature is 30cm for a spherical mirror, then the focal length is half of this sum, which would be 15cm.
What is the focal length of concave mirror of radius 20cm?
The focal length of a concave mirror is half of its radius of curvature. Therefore, for a concave mirror with a radius of 20 cm, the focal length would be 10 cm.
Which lens bends a light ray more or less with a shorter or with longer focal length?
A lens with a shorter focal length will bend a light ray more, while a lens with a longer focal length will bend it less. The strength of a lens is inversely proportional to its focal length - shorter focal lengths result in stronger bending of light rays.
What is the power of 2 m focal lens?
The power of a lens is calculated as the reciprocal of its focal length in meters. Therefore, a 2 m focal length lens would have a power of 0.5 diopters.
Will focal length of a concave mirror would increase decrease stay the same if the mirror were made flatter?
If a concave mirror is made flatter, its focal length will increase. This is because a flatter mirror has a larger radius of curvature, resulting in light rays converging at a point farther away from the mirror.
What would be the magnification of a telescope with a focal length of 3000 millimeters using an eyepiece of focal length equal to 15 mm?
The magnification of a telescope is calculated by dividing the focal length of the telescope by the focal length of the eyepiece. In this case, the magnification would be 3000 mm (telescope focal length) divided by 15 mm (eyepiece focal length), which equals a magnification of 200x.
What is the focal length of a telescope's mirror if I use an eyepiece with a focal length of 26 mm and I get a magnification of 70x?
The focal length of the telescope's mirror can be calculated using the formula: Telescope focal length = Eyepiece focal length × Magnification = 26 mm × 70x = 1820 mm Therefore, the focal length of the telescope's mirror would be 1820 mm.
What would be the effect on magnification to increase the focal length of microscope and telescope?
The focal length of a telescope is directly related to the magnification in that the longer the focal length, the more magnification you get from the telsceope. How the focal length of a telescope relates to the length of the telescope itself depends on the design of the telescope. In a refracting telescope, the focal length is approximately the length of the telescope. In a reflecting telescope, the focal length is roughly two time the length of the telescope.
Sum of focal length and radius of curvuture is 30cmWhat is the focal length of this spherical mirror?
If the sum of the focal length and radius of curvature is 30cm for a spherical mirror, then the focal length is half of this sum, which would be 15cm.
For a research telescope (with a long focal length) would the thickness be greater or less than for a backyard telescope (with a short focal length)?
Technically the shorter the focal length, the thicker the mirror. But some short focal length telescopes have relatively thin mirrors all the same.
What is the focal length of concave mirror of radius 20cm?
The focal length of a concave mirror is half of its radius of curvature. Therefore, for a concave mirror with a radius of 20 cm, the focal length would be 10 cm.
Which lens bends a light ray more or less with a shorter or with longer focal length?
A lens with a shorter focal length will bend a light ray more, while a lens with a longer focal length will bend it less. The strength of a lens is inversely proportional to its focal length - shorter focal lengths result in stronger bending of light rays.
What is the power of 2 m focal lens?
The power of a lens is calculated as the reciprocal of its focal length in meters. Therefore, a 2 m focal length lens would have a power of 0.5 diopters.
What is the power of a convex lens whose focal length is 25 cm?
The power of a lens is the reciprocal of its focal length in meters. So, a lens with a focal length of 25 cm would have a power of +4 diopters (1/0.25 = 4).
What does MM stand for in digital cameras?
The MM is the focal length in millimeters. The focal length would be the distance between the lens and the back of the camera where the image is formed.
If a telescope with an objective lens of ten feet focal length is used with an eye piece of one quarter inch focal length what would the resulting magnification be?
To calculate the magnification of a telescope, divide the focal length of the objective lens by the focal length of the eyepiece. In this case, the magnification would be 480x (10 feet / 0.0208 feet).
