Answer:
Explanation:
Using Snell's law
n₁ sinθ₁ = n₂ sinθ₂
for 420 nm wavelength
where n₁ = 1.00 ( refractive index of air) and θ₁ = 30° n₂ = 1.660
1.00 × sin 30° = 1.660 sinθ₂
sinθ₂ = 0.3012
θ₂ = sin⁻¹ 0.3012 = 17.53°
for 690 nm wavelength
n₁ sinθ₁ = n₂ sinθ₂
sinθ₂ = 0.5 / 1.630
θ₂ = sin⁻¹ 0.3067 = 17.86°
the angle between the two beam = 17.863° - 17.53° = 0.333°
<span>Density
is a value for mass, such as kg, divided by a value for volume or area.
Density is a physical property of a substance that represents the mass of a certain substance per unit volume or unit area. From the problem statement, we are given the density of the living matter in a particular area and the area. To calculate mass, we simply multiply the area to the density. However, we should remember that the units should be homogeneous or the same and if not, we convert.
Mass = density x area
Mass = 0.10 g / cm^2 (0.125 ha) ( 1x10^8 cm^2 / 1 ha )
Mass = 1250000 g or 1250 kg</span>
It would be{ 4) 2 silver spoons}<span>
that the material reflects light but does not refract it</span>
Metal as it is a conductor of electricity
