Calculate the intensity of thermal radiation from a blackbody by using raleigh-jeans law at a temperature of 1000 k and with a wavelength of 1000 nm (infrared), 500 nm (visible), and 100 nm (ultraviolet). (3 points) (b) recalculate the above intensities using plank's law

Explanation:

Given that,

Temperature = 1000 K

We need to calculate the  intensity of thermal radiation from a black body

For wavelength 1000 nm

Using Raleigh-Jeans Law

Put the value into the formula

For wavelength 500 nm

For wavelength 100 nm

We need to calculate the intensity

Using Plank's Law

For wavelength 1000 nm

Put the value into the formula

For wavelength 500 nm

For wavelength 100 nm

Hence, This is the required solution.

i think it's 35 meters

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards