When an atom transists from 2E to E, then it emits a photon of wavelength λ . What will be the wavelength for the transition from (4/3)E level to E level? (Solve this by formula- 1/λ= R[1/n1²-1/n2²]

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. you 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. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?