Unit test of Relativity a. How does the speed of light in a vacuum change when observed from two different frames of reference? b.Which frames of reference can be studied using special relativity? (2 points)
Cosmology a. Identify the most widely accepted theory for the formation of the universe. In your description, be sure to include how the universe began and what is happening to the size of the universe today. b.Explain redshift and what it led scientists to conclude about the universe. c. Scientists have proposed three models of … Read more
Quantization (8 points) What is a blackbody radiator? What was the ultraviolet catastrophe? (1 point) Explain what is meant by quantized light. Explain why observations of blackbody radiation provide evidence for the quantization of light. Write 2 – 3 sentences explaining how quantum mechanics describes light and matter. How does the interference pattern of electrons … Read more
Unit test Half-life The half-life of iron-61 is 6 minutes. If a sample originally contains 8 g of the isotope, how much remains after 18 minutes? your reasoning. The ratio of carbon-14 to nitrogen-14 in an artifact is 1:3. In other words, ¼ of the original carbon-14 remains. Given that the half-life of carbon-14 is … Read more
Radioactivity Write 2 – 3 sentences describing the mass number, charge, and penetrating ability of alpha particles.
Nuclear Structure (10 points) Protons and neutrons make up the nucleus of an atom. Write 3 – 4 sentences describing the electrostatic force between each pair of particles (proton-proton, proton-neutron, neutron-neutron) and the strong nuclear force between each pair of particles. (5 points) Write 3 – 4 sentences predicting the changes in electrostatic force, strong … Read more
Optics 10.4.3_Lab_Optics_Dry_lab_ Analyze What happens to the height of the image (hi) formed by a convex lens as the object moves closer to the lens? What happens to the distance from the image to a convex lens (di) as the object moves closer to the lens? How do the calculated results compare with the experimental … Read more
Electronic design and analysis skills Using either a Buck-Boost or a Fly-back Converter, design a circuit to control the speed of a DC Motor by supplying a voltage in the range from 30V to 60 V to the DC Motor. You need to do the following things: 1. Design a circuit to meet the above … Read more
light What is light.Provide relevant information on wave behaviour of light, evidence for light and particle model of light. Calculate how the energy of light can be determined from it’s frequency.calculate the range of energy
Radiation physics (a) i. What is the origin of the lines associated with the transitions between excited states in the hydrogen atom. ii. Given that the electron binding energy for a hydrogen atom is –13.6 eVcalculate the energy difference between the n=4 and n=2 states in thehydrogen atom. iii. To which part of the EM … Read more
