Light Bulbs Shining The Light Essay

Activity: 1. Observe and describe the effect of different wavelengths on speed of electrons emitted. 2. Observe and describe the effect of different levels of intensity on number of electrons emitted. 3.

Here angles of red light are larger than blue light. Red light is the long wavelengths and Blue light is short wavelengths. (3) Fig 2: Grating Spectrometer Amplitude and Phase Grating: In this fig we can see both Amplitude and Phase gratings. When an incident light pass through on the material can pass through the gaps on the substrate and transmit through it and remaining light reflects. In phase grating light can pass through both the gaps and top of the substrate, so the reflected light has phase shift.

Trichromacy theory supposes there are three cone types with different spectral sensitivities and that the perceived colour is determined by the cone output depending on the wavelengths of light absorbed from the image. If two physically different lights evoke the same responses in the 3 cones then the two lights will look the same (metamers). This is how trichromacy explains the existence of

For each n, show every allowed value of l. Label every energy level spectroscopically (1s, 2s, 2p, ...). Indicate the m degeneracy of each l level. Show that the total degeneracy of each En is n2. Solution: Bohr radius separates the potential energy of two electrons according to the equation: U=e2/4πε0a0 …Equation [1]. This equation represents one atomic unit of energy.

This could have impacted the pigments obtained which were then used on the TLC plate. The TLC was not too difficult to read, however, especially when looked at under a UV light. For the yellow column, there were faint bands all the way up to the top band which was located at 3cm, as you can see in figure 1. The green bands were much darker and easier to read. There were more than 5 bands preceding the darkest band which was located 2.3cm above the starting location.

In the periodic table lithium’s atomic number is 3. The atomic number describes the number of protons in the nucleus and the number of electrons in the atom when it is not ionized. (An ion is an atom where the amount of protons and electrons is not equal.) Lithium has 3 protons; therefore it must have 3 electrons when it is not ionized. The protons and neutrons together form the nucleus.

Now, the charge he measured nearly 100 years ago is accepted within 1% of our current value. This means that one electron has a charge of 1-. Through the use of the charge-to-mass ratio, Millikan was able to determine the mass of an electron: 9.1 X 10^-28g = 1/1840 mass of a hydrogen

The effect of light should be cumulative if light only acts as a wave and little by little the light should add up until it leads electrons to be emitted. But what triggers the emission of electrons is a clear cut minimum of the frequency of the light. What this implies is that energy is directly linked to frequency and more energy with the higher light frequency. The discovery of the phenomena that the minimum amount of energy which could be gained or lost by an atom was a result of this observation. This minimum amount was named by Max Planck as quantum, plural of which is quanta, meaning how much.

In this experiment, 293 mg of aldehyde was weighted for method 1 instead of 250 mg and. Although .7906 mg of phosphonium salt was added, this probably was not enough to complete the reaction. The only significant change throughout method was 1 was that the yellowish mixture became slightly lighter. However, it was found that after vacuum filtration, there was some white and yellow

If the KeV is greater than fifty, the photons will have too much energy and will create scatter, which could lead to the energy going through another interaction or it could just continue colliding into another electron. To determine the probability of an x-ray photon this interaction is a function for the energy and the atomic number for the atom it interacts with. For this we use the equation of incident electron (Ei) equals binding electron (Eb) plus kinetic energy electron (Eke). (Bushong