Luminance - Study guides, Class notes & Summaries

PSYC 375 (JMU) Exam 2 Questions And Answers Retinal Ganglion Cells - answerThe third layer of retinal neurons whose axons leave the eyeball and form the optic nerve. 1.25 million per EYE Two types of RGCs - answerParvocellular (P cell) Magnocellular (M cell) P vs. M Cells: Number - answerP: 80% M: 20% P vs. M Cells: Location - answerP: Central retina M: Periphery P vs. M cells: Size - answerP: Thinner axon M: Thicker axon P vs. M Cells: Color - answerP: Excite or inhibit M: No pref...

social cognition (theory) an approach in social psychology that uses cognitive psychology principles to study social psychology phenomena. HOW PEOPLE PROCESS, use, and store information to make sense of and interact with the social world. what is social psychology scientific study of how people's thoughts, feelings, and behaviors are influenced by the actual, imagined, or implied presence of others. emphasis on social nature of individuals ABC's of social psychology Affect (fe...

Ohm's Law - correct answer *V = IR* - Voltage and electromotive force are measured in volts - Current is measured in amperes or amps (I is for intensity) - Resistance is measured in ohms Ω Volt ÷ KΩ = milliamp Time Constant - correct answer τ = RC TIme constant is the time it takes for the capacitor to charge to 63% of maximum. It takes 5 time constants to reach maximum. Cutoff Frequency - correct answer f(cutoff) = 1/2 πτ = 1/2 πRC The cutoff frequency of a filter is inv...

Which of the following is the main reason to prohibit food and drink in a film darkroom? correct answers Prevent artifacts Which of the following terms best describes the amount of light that is emitted from or scattered by a surface? correct answers Luminance Which of the following names a device that can be used to measure darkroom humidity levels? correct answers Psychrometer Proper darkroom ventilation should include ____ room changes of air per hour correct answers 8 to 10 Which...

RADT 2403 ch 19-21 Exam Test Marking Scheme New Update Some advantages of digital imaging over conventional screen/film radiography include: - Answer -Immediate visualization of the image and ability to adjust the image post-exposure The H&D curve for digital imaging is linear rather than S shaped because: - Answer -Of a wider dynamic range A digital image is made up of: - Answer -A matrix of pixels Which matrix size has the smallest pixels? 128 x 128, 256x 256, 512 x 512, or 1024 x ...

Brightness correct answersDefined as the amount of luminance (light emission) of a display monitor Diagnostic-type protective tube housing correct answersRequired to protect the patient and imaging personnel from off-focus, or leakage, radiation by restricting the emission of x-rays to the area of the useful, or primary, beam. The housing enclosing the x-ray tube must be constructed with lead lining so that radiation leakage through any portion of the housing away from the useful beam, mea...

candela is equal to ______ lumens - 12.57 corridor lighting levels should provide at least______ of the luminance of adjacent areas - 20% detects movement (switch level occupancy detector - slod entrance elevator, escalator lobbies, corridors and stairways. usually lighted continuous or for long periods of time. usually ceiling and wall mounted fixtures - public areas lighting on a work surface or object that is not predominantly incident from any particular direction - diffused lighting ...

An increased part thickness results in: - Answer-increased beam attenuation ( beam absorption) A body tissue with an increased tissue density results in: - Answer-increased beam attenuation Unwanted exposure to the IR due to scatter radiation is called: - Answer-fog Brightness/density is a quality related to the _____________ of the radiographic image. - Answer-Visibility of structures Contrast is a quality related to the ______ of the radiographic image - Answer-Visibility of struct...

LMRT Core & Patient Care Exam Questions With Answers Latest Updated 2024 (GRADED A+) Edge Enhancement - correct answers A process in which images can be made sharper and have better contrast Source or Reservoir of Infection - correct answers Any place where pathogens can thrive in sufficient numbers to pose a threat Susceptible Host - correct answers Patient whose natural resistance to infection is diminished Pathogen - correct answers Microorganisms that cause disease What are the standa...

Which of the following image types are best viewed in a monochrome display? MG/CT/US/MR - MG/CT ______ measures the light intensity per unit of area. - Luminance Response time to display an image from local cache: - should be less than 3 seconds Which of the following is not an environmental factor for a reading station? ambient light/ergonomics/ software version/ambient air - Software version Downloads and self installs Access a web page via URL link - Smart client Browser-based Use a ...