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**Spherical**belt: Surface area for a sphere = SA = 4 π r² --- ... + z² = R² We express now the equation of the sphere in SPHERICAL coordinates { x = ϱ * sin(φ) * cos(ϑ) { y = ϱ * sin...2 Answers · Science & Mathematics · 18/03/2012

For

**spherical**mirrors: f = -r/2, where f is the focal length and r...the directions appropriately, then continue them to the**spherical**mirror. From the mirror they will intersect at a point 6cm to the...1 Answers · Science & Mathematics · 20/02/2018

**Spherical**shaped mirrors are used in telescopes...almost. Parabolic mirrors actually do a much better job than**spherical**shaped mirrors. But parabolic mirrors are much...1 Answers · Science & Mathematics · 26/03/2008

**Spherical**aberrations are never desirable. Aberrations are departures of the performance of an optical system from the predictions of paraxial optics. Aberration leads... to compensate for aberration. This occurs in nature usually in eyes of animals that have aged such that the lens of the eye has distorted leading to**spherical**aberrations.1 Answers · Science & Mathematics · 19/01/2010

Consider an imaginary

**spherical**surface concentric with the shell, lying within the substance of the shell. If...1 Answers · Science & Mathematics · 21/02/2013

I assume an homogeneous

**spherical**distribution of charges (radius R): ρ = constant Due to the**spherical**...2 Answers · Science & Mathematics · 26/08/2012

A

**spherical**sound wave's intensity changes with distance, r, according to...1 Answers · Science & Mathematics · 09/12/2012

The

**spherical**lens equation is approximated as n2/si+n1/so = (n2-n1)/R (ref...3 Answers · Science & Mathematics · 22/02/2010

**Spherical**lenses refer to the curvature of their surface .. part of a sphere. ..., cameras, magnifying glasses .. all use**spherical**lenses.**Spherical**lenses can have convex or concave curvature.4 Answers · Science & Mathematics · 06/07/2012

Water has a

**spherical**shape due to the cohesive forces between water molecules...property. This is how water molecules stay**spherical**. Just soak your hand with oil and there'll be...3 Answers · Science & Mathematics · 09/10/2011

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