Exploring the Wonders of Light: Reflection, Refraction, and Color Perception
Reflection
When light travels through a medium and encounters a surface that separates it from other mediums, some of it is reflected and continues propagating through the same medium, changing direction and obeying the laws of reflection:
- The incident beam, normal, and reflected ray are in the same plane.
- The angle of incidence and the angle of reflection are equal.
A Kaleidoscope
A kaleidoscope (from the Greek kalós eidos, beautiful image, and scopéo, observe) is a tube containing three mirrors that
Read MoreFundamentals of Physics and Medical Imaging
WEEK 11 – THE ATOM, QUANTA AND IONISING RADIATION
Mass-Energy Equivalence
The physical principle that a measured quantity of energy is equivalent to a measured quantity of mass. The equivalence is expressed by Einstein’s equation E = mc2, where E represents energy, m the equivalent mass, and c the speed of light.
Radioactivity
Radioactivity refers to the particles emitted from nuclei due to nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces in
Read MoreThe Fundamentals of Physics: A Comprehensive Guide
WEEK 11 – THE ATOM, QUANTA AND IONISING RADIATION
Mass-Energy Equivalence
The physical principle that a measured quantity of energy is equivalent to a measured quantity of mass. The equivalence is expressed by Einstein’s equation E = mc2, where E represents energy, m the equivalent mass, and c the speed of light.
Radioactivity
Refers to the particles that are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces
Read MoreScience and Job Hunting Resources
Grammar
She was reading the newspaper when she saw the advert.
At the interview, they didn’t ask Tom many questions.
Ellie looked at ten websites before she found an interesting job.
What job did you have before?
While Peter was explaining his experience, someone knocked on the door.
Vocabulary
Alison is extremely hard-working. She doesn’t stop until she’s finished what she has to do.
You have to smile when Michael is around. His jokes are great and he’s so funny.
Kate is really selfish. She only thinks
Read MoreMeasurement of Concrete Works in Chilean Construction
Measurement of Concrete Works
General
1 Measurement by Volume
Concrete works are measured by volume, excluding the space occupied by steel trusses and pipes embedded within them, with a diameter or transverse dimension not exceeding 0.25 m.
2 Measurement of Plain and Reinforced Concrete Elements
Regardless of the dimensions and shapes of plain or reinforced concrete elements, measurement is done by volume, except for glazed rib tiles that form ceilings and foundation slabs (Radierer).
3 Deductions for
Read MoreFingerprint Identification: A Comprehensive Guide
Basic Definitions
Recognize
The mental process by which an individual associates a symbol with a meaning and vice versa.
Identify
Action and effect to identify. The process by which the characteristics of a person, animal, thing, or event are evaluated to distinguish it from others.
Individual
A procedure in which an item is different from others of their own gender. That is, unique in the universe.
Types of Individual Identification
- Civil Identification: Birth Certificate, Passport.
- Police Identification: