One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. having recently studied optics in your physics class, you're not too surprised to see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across, and you estimate that the distance from the window shade to the wall is about 3 m . estimate (a) the average wavelength of the sunlight (in nm) and (b) the diameter of the pinhole (in mm).

a)

b)D=0.402 mm

Explanation:

We know that visible range of sun light is 400 nm to 700 nm.

So the average wavelength

To find the diameter

We know that the relation

Where D=Diameter of pin hole

          λ=Average wavelength

           w=Central distance

        L=length

So now by putting the values

D=0.402 mm

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat