The light rays from the sun is making an angle of 30° then the angle above the horizon of the sun is 48.32°.
What is an angle?When two lines converge at a point, they produce an angle. The word "angle" refers to the length of the "gap" between these two rays. The symbol is used to denote it.
Radians, a unit of roundness or rotation, and degrees are the 2 most common units used to measure angles. In daily life, angles are present.
As per the information given in the question,
Use the equation of snell's law,
(sin i)/(sin r) = n₂/n₁
r = sin⁻¹ (n₁ sin i)/n₂
Put n₁ = 1.33 and n₂ = 1 also substitute i = 30°
r = sin⁻¹ (1.33) (sin 30)/1
r = sin⁻¹(0.665)
r = 41.68°
The formula for the angle above the horizon,
θ = 90° - r
θ = 90° - 41.68°
θ = 48.32°.
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exitance is defined as the power per unit area that is emitted from the surface of an object. for a blackbody radiator, the exitance emitted is dependent upon its temperature. calculate the exitance in w/cm2 for a blackbody radiator at 46 k and 335 k. exitance at 46 k
The exitance in W/cm² for a blackbody radiator at 335 K is 232 W/cm².
The exitance of a blackbody radiator is given by the Stefan-Boltzmann law: exitance = sigma × [tex]T^4[/tex]
where exitance is the power per unit area emitted from the surface of the object, sigma is the Stefan-Boltzmann constant (5.67 x [tex]10^{-8}[/tex] W/m² K^4), and T is the temperature of the blackbody radiator in Kelvin.
To calculate the exitance in W/cm² for a blackbody radiator at 46 K, we can substitute this temperature into the equation:
exitance = 5.67 x [tex]10^{-8}[/tex] W/m² [tex]K^4[/tex] × [tex](46 K)^4[/tex] = 0.000715 W/m²
Converting this to W/cm², we get:
exitance (W/cm²) = 0.000715 W/m² × (100 cm/m)² = 0.0715 W/cm²
To calculate the exitance in W/cm² for a blackbody radiator at 335 K, we can substitute this temperature into the equation:
exitance = 5.67 x [tex]10^{-8}[/tex] W/m² [tex]K^4[/tex] × [tex](335 K)^4[/tex] = 2.32 W/m²
Converting this to W/cm², we get:
exitance (W/cm²) = 2.32 W/m² × (100 cm/m)² = 232 W/cm²
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