Use a protractor to measure the angle from the reference line to the lines drawn in step 6. 8. Record the angle created by the laser pointer through the air as the Angle of Instance and the angle created by the laser pointer through the water as the Angle of Refraction. 9. Use Snell's Law to determine the Index of Refraction of Water.
The reaction center contains chlorophyll a. The role of pigments is to catch the wavelengths of light. In Exercise 4B, the function of DPIP will be reduced when light strikes the chloroplasts and the electrons will be boosted to higher energy. In this experiment NADPH is replaced by DPIP. The source of electrons that will reduce the DPIP is light.
Introduction: All matter on Earth is a pure substance or a mixture. The simplest way to find out what is in some of these mixtures is through paper chromatography. In this experiment the intent is to be able to use chromatography to separate the components of black ink. The topic of paper chromatography was chosen because of an interest and curiosity of what ink mixtures were made up of. This experiment was chosen to prove that different solvents and paper could be used to separate the different materials in black ink.
The acoustic waves generated from the absorbing tissue reach the detectors in the transducer array at different times. This time delay leads to the precise localization of the source tissue and creation of a map of the function of electromagnetic energy deposition. To obtain a PAT image, many photoacoustic images are taken at different angles by pulsing electromagnetic radiation onto a tissue which is suspend in a bath while a piezoelectric transducer detects the generated photoacoustic waves to reconstruct an image. PAT suffers from optical scattering, which lowers the spatial resolution with an increasing depth in soft tissues (3). PAT has a variety of applications in the many emerging fields of scientific research and may one day prove to be a valuable resource in a clinical setting.
1. Light can transmit through some matter When encountering matter, light is often absorbed and/or reflected. However, it can also pass through some kinds of matter, depending on an object’s nature. 2. Light travels in straight lines When an object is held between a point source of light and a screen, a shadow is formed.
Infrared spectroscopy is a test used to determine the structural identities of unknown chemical compounds. It can determine the identity and relative purity of compounds by measuring how much the bonds between the atoms in the compound “bend” or “stretch”. Infrared spectroscopy works based on the idea that the bonds between atoms can absorb energy and that when they do, they act similarly to springs in that they can be stretched or compressed, and can be made to bend or “wag”. IR spectroscopy can give the identity of functional groups and atoms in a compound by analyzing the frequency of these bond movements. The pictures below give an example of these motions.
Wave A has a greater frequency than wave B, but the amplitude of the two waves is the same. The energy of wave A is greater than that of wave B. _________________________ ____ 12. The unit for frequency is the meter. _________________________ ____ 13.
A certain red light has a wavelength of 725 nm and another red light has a frequency of 4.28 X 1014 /sec. Which would have higher energy per photon? (4.28 X 1014/sec; it is shorter) ______________8. Find the color of light whose frequency is 5.21 X 1014 cycles/sec.
Aim: The aim of this experiment is to understand reflection and refraction and how they vary with different matters. Data/Results: The hand drawn images are attached to this lab on a separate sheet of paper. Questions: 1. Based on both of your observations on reflection, what can you say about the relationship between the angle of incidence and the angle of reflection? The angles of incidence and reflection are both the same.
Liam Stephenson controlled assessment Introduction In my course work I will be looking at how the thickness of a converging lens affects the focal length. The factors involved in this experiment are: light, lens curvature, refraction and thickness of the lens, these will determine the focal length; the focal length is the length between the focus and the lens. Light-visible light is an electromagnetic wave in the electromagnetic spectrum The speed of light depending on the medium it is in, for example the speed of light is 300,000 km/s however when light travels through other medium such as water or glass the speed of light is slowed this is because water and glass is denser than a vacuum of air. Due to it being more dense and a change in speed, the direction of the wave will change this is