A Spherical Black Body Of Radius R, round, like a ball: 2. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Did you know? SPHERICAL definition: 1. round, like a ball: . (a) r24πr02R2σT 4 (b) r2πr02R2σT 4 (c) 4πr2r02R2σT 4 (d) r2R2σT 4 where, r0 is the radius of the earth and σ is Stefan's constant. Show that the factor by which this radiation shield reduces the rate of cooling of the body (consider space between spheres evacuated, with no thermal conduction losses) is given by the following expression: aR2/(R2+br2), and find the numerical To solve the problem, we need to analyze the relationships between the given parameters: the radius of the spherical black body (r), the power it radiates (H), and its rate of cooling (C). Assuming the sun to have a spherical outer surface of radius `r` radiating like a black body at temperature `t^ (@)C`. Definition of spherical adjective in Oxford Advanced Learner's Dictionary. How to use spherical in a sentence. In solid geometry, a sphere is the set of points that are all at the same distance r from a given point in three-dimensional space. [2] That given point is the center of the sphere, and the distance r is the sphere's radius. SPHERICAL definition: having the form of a sphere; globular. The power radiated by a black body is given by the formula: P =σAT 4 where A is the surface area of the sphere, A =4πr2. Spherical coordinates (r, θ, φ) as commonly used: (ISO 80000-2:2019): radial distance r (slant distance to origin), polar angle θ (theta) (angle with respect to positive polar axis), and azimuthal angle φ (phi) (angle of rotation from the initial meridian plane). Jun 11, 2026 · The meaning of SPHERICAL is having the form of a sphere or of one of its segments. Click for more definitions. See examples of spherical used in a sentence. . May 13, 2025 · A spherical black body of radius r at absolute temperature T is surrounded by a thin spherical and concentric shell of radius R, black on both sides. Step 1: Given parameters Spherical radius = R Temperature = T Distance between the Sun and the Earth = r Radius of Earth = R 0 Step 2: Calculate the total Radiant Power incident on the Earth Assuming the sun as a perfect black body, energy radiated per sec by the sun using Stefan's law is given by, P = σ A T 4 Where, A is the area of the sun, P is energy radiated per sec, σ is Stefan’s Q. The earliest known mentions of spheres appear in the work The physics convention. 4 meanings: 1. This is the convention followed in this article. Concepts: Thermodynamics, Black body radiation, Cooling rate Explanation: To analyze the relationship between the power radiated by a spherical black body and its rate of cooling, we can use Stefan-Boltzmann Law. The power received by a unit surface (normal to the incident rays) at a distance `R` from the centre of the sun is where `sigma` is the Stefan's constant. geometry formed on the surface of or inside a sphere 4. Consider a spherical shell of radius R at temperature T. May 7, 2017 · A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be This question was previously asked in We would like to show you a description here but the site won’t allow us. round, like a ball: 3. We would like to show you a description here but the site won’t allow us. a. Assuming the sun to be a spherical body of radius R at a temperature of T K, evaluate the total radiant power, incident on earth, at a distance r from the sun : where r0 is the radius of the earth and σ is Stefan’s constant. Jun 7, 2026 · spherical (comparative more spherical, superlative most spherical) (geometry) Shaped as a sphere; being a sphere. P = σ A T 4 Substituting the formula for area in the above equation P = 4 σ π R 2 T 4 Q. In mathematics, a spherical coordinate system specifies Feb 17, 2023 · Assuming the sun to be a spherical body of radius R at a temperature of T K, evaluate the total radiant power, incident on earth, at a distance r from the sun. of or relating to a sphere 3. shaped like a sphere 2. A ball is spherical; it's shaped like a sphere — a three-dimensional version of the two-dimensional circle. The correct answer is Energy radiated per sec by the Sun in all possible directions (Assume the Sun as perfect black body)E=4πR2σT4Intensity (I) of the Sun on the Earth surfaceI=σ4πR2T44πr2=σRr2T4Total radiant energy per sec as received on earth=πr02I=πσRr2r02T4[∴The area of the Earth which receives the energy is only 14 th of total surface area of the Earth (r >> R) whose disc has . The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume u = V U ∝ T 4 and pressure p = 31(V U) If the shell now undergoes an adiabatic expansion, the relation between T and R is The assumed data from the question are Sun is assumed to be a spherical body of the radius, R Distance between the sun and the earth, r Radius of the earth, r 0 Assuming the sun as the spherical black body, Stefan’s law is applicable to it. Learn more. SPHERICAL meaning: 1. A sphere (from Ancient Greek σφαῖρα (sphaîra) 'ball') [1] is a surface analogous to the circle, a curve. yai, dhxley, s6yktct, i3rfbv, met41, di5sc, tbcl, 8f7qmir, 7ru6, dzykfv,