what is the formula used to calculate resolving power?
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The aperture of your eye is your pupil. A telescope has a much larger aperture, and therefore has a greater resolving power. The minimum angular separation of two objects which can just be resolved is given by θmin = 1.22 λ/D, where D is the diameter of the aperture.
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In equation form, this is P=1f P = 1 f , where f is the focal length of the lens, which must be given in meters (and not cm or mm). The power of a lens P has the unit diopters (D), provided that the focal length is given in meters. That is, 1D=1m, or 1m−1 1 D = 1 m , or 1 m − 1 .
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Now find total reading using the equation, TR = MSR+VSR = N+(n x L.C) and apply the zero correction. Take the mean of the different values of the diameter and show that in the result with the proper unit.
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Suppose an object is placed u cm in front of a spherical mirror of focal length f such that the image is formed v cm from the mirror, then u, v and f are related by the equation; 1/f= 1/u + 1/v. This equation is referred to as the mirror formula. The formula holds for both concave and convex mirrors.
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The conversion factor would be 1 mg/l = 3 NTU = 1 ppm based on 1 mg/l = 1 ppm. Each application may have a different conversion factor due to the varying response of the turbidity instrument based on the particulars of the application and samples.
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The principal focal length of a lens is determined by the index of refraction of the glass, the radii of curvature of the surfaces, and the medium in which the lens resides. It can be calculated from the lens-maker's formula for thin lenses.
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Resolution refers to the number of pixels in an image. Resolution is sometimes identified by the width and height of the image as well as the total number of pixels in the image. For example, an image that is 2048 pixels wide and 1536 pixels high (2048 x 1536) contains (multiply) 3,145,728 pixels (or 3.1 Megapixels).
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Answer. Answer:-To get the total magnification take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece, usually 10X.
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In my book'a section on Young's double-slit experiment, the formula, d=mλsinθ, is given. In this equation d is the distance between two slits, λ is the wavelength of light coming through the slits, and θ is the angle between the central reference to the brightest maximum on the screen opposite the slits.
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For example, suppose an object is at 1/2 meter. Converted to centimeters, the object is 50 cm away. Divide 100 by 50 and the result is 2 D of power needed to focus at this distance. The formula to remember is D = 100/F, where D is diopters and F is the focal length (or distance) in centimeters.
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With a compound microscope, the total magnification can be determined by multiplying the magnifications of the objective and ocular lenses. Consequently, an ocular lens of 10X coupled with a 40X objective yields a total magnification of 400X.
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The standard formula is C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the total volume of the solution. If you have a small concentration, find the answer in parts per million (ppm) to make it easier to follow.
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1 nm corresponds to 3x10^17 Hz. For comparison, the equivalent figures for ultra-violet light are 100 nm, 3x10^15 Hz and 1.2 Kev.
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The next equation, A = log (1÷T) indicates the absorption of light by taking the inverse of the transmission figure, then taking the common log of the result. So an absorbance (A) of zero means all the light passes through, 1 means 90% of the light is absorbed, and 2 means 99% is absorbed.
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The relationship between wavelength and numerical aperture is valid only for increased resolving power when light rays are parallel. Therefore, the resolving power is dependent on another factor, the refractive index. This is the bending power of light passing through air from the glass slide to the objective lens.
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The relation between error in refractive index n and thickness error d is given by d ( n − 1 ) n = . (8) Assuming d d , the error in refractive index simply becomes d ( n − 1 )/ d .
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To figure the total magnification of an image that you are viewing through the microscope is really quite simple. To get the total magnification take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece, usually 10X.