steradian वाक्य
उदाहरण वाक्य
मोबाइल
- A steradian can be defined as "'the solid angle subtended at the center of a unit sphere by a unit area on its surface " '.
- This gives the expected results of 4 steradians for the 3D sphere bounded by a surface of area and 2 radians for the 2D circle bounded by a circumference of length.
- Compiling Kikuchi maps which cover more than a steradian requires that one take many images at tilts changed only incrementally ( e . g . by 2?in each direction ).
- Based on the fact that 1 candela = 1 lumen?" steradian and 1 lumen = 1 / 683 Watts, 1 candela should be 1 / 683 Watt?" steradian.
- Based on the fact that 1 candela = 1 lumen?" steradian and 1 lumen = 1 / 683 Watts, 1 candela should be 1 / 683 Watt?" steradian.
- If the source emitted uniformly in all directions, the total radiant flux would be about 18.40 mW, since there are 4 & pi; steradians in a sphere.
- Those molecules together generate a Raman signal in the order of 2?0 " 11 W ( 20 pW ) or roughly one hundred million photons / sec ( over 4? steradians ).
- The solid angle of a face subtended from the center of a platonic solid is equal to the solid angle of a full sphere ( 4 steradians ) divided by the number of faces.
- Because the surface area " A " of a sphere is 4 " r " 2, the definition implies that a sphere measures 4 ( H " 12.56637 ) steradians.
- A careful distinction needs to be made between dimensionless derived units, such as the radian ( rad ) and steradian ( sr ) which are useful for clarity, although they are both algebraically equal to 1.
- A steradian is also equal to the spherical area of a polygon having an angle excess of 1 radian, to } } of a complete sphere, or to ( } } ) H " 3282.80635 square degrees.
- Thus at 100 K the energy flux is 5.67 W / m 2, at 1000 K 56, 700 W / m 2, etc . The radiance ( watts per square metre per steradian ) is given by
- At the Sprint's nominal range of, its own few-kiloton warhead would produce a fireball perhaps across, which represents an angle of 1 km / 45 km 2 = 0.001 steradians ( sr ).
- It's because you're gathering light through a large aperture and squishing it down into a little eyepiece-it's not because you are somehow seeing more photons per steradian of sky or anything of that sort.
- The distribution of output power as a function of the possible directions ( \ theta, \ phi ) is given by its radiation intensity U ( \ theta, \ phi ) ( in SI units : watts per steradian, W?" sr " 1 ).
- The angular diameter of the Earth as seen from the Sun is approximately 1 / 11, 700 radians ( about 18 arc-seconds ), meaning the solid angle of the Earth as seen from the Sun is approximately 1 / 175, 000, 000 of a steradian.
- Note that dimensional analysis shows that the unit of steradians, shown in the denominator of left hand side of the equation above, is generated in and carried through the derivation but does not appear in any of the dimensions for any element on the left-hand-side of the equation.
- No monopole candidates were detected, meaning that the flux of monopoles is less than 5.6 & times; 10 " 15 per square centimetre per steradian per second ( cm " 2 sr " 1 s " 1 ) for velocities between and ( between and ).
- The factor \ pi ( which really should have the units of steradians ) is a result of the fact that intensity is defined to exclude the effect of reduced view factor at large values \ theta; note that the solid angle corresponding to a hemisphere is equal to 2 \ pi steradians.
- The factor \ pi ( which really should have the units of steradians ) is a result of the fact that intensity is defined to exclude the effect of reduced view factor at large values \ theta; note that the solid angle corresponding to a hemisphere is equal to 2 \ pi steradians.
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