rp reflection and refraction

• According to the video, what should you be able to do by the end of this lesson?

  Describe how waves are reflected, absorbed, or transmitted
• This video focuses on wave behavior for which physics students?

  Triple physics students
• According to the video, what makes wave reflection a common exam question?

  It's a relatively straightforward topic
• What are the three things that can happen when a wave hits a boundary with a different material?

  Transmission, absorption, and reflection
• Does wave behavior at a boundary apply only to transverse waves?

  No, it applies to longitudinal waves also
• What is the term for when waves change direction when passing from one material to another?

  Refraction
• What happens if the energy of a wave is absorbed by a material?

  The wave may not pass through
• On what does whether a wave is transmitted, absorbed, or reflected depend?

  The material and the wavelength
• In a ray diagram, what does the arrow on a ray of light indicate?

  The direction of the ray
• What term do scientists use for a ray of light striking a surface?

  Incident ray
• In ray diagrams, what is the dotted line drawn at right angles to the surface called?

  The normal
• What is measured between the incident ray and the normal?

  The angle of incidence
• What is the relationship between the angle of incidence and the angle of reflection?

  They are equal
• If the angle of incidence is $30^\circ$, what is the angle of reflection?


  $30^\circ$
• In a ray diagram, what should be drawn on the incident and reflected rays?

  Arrows showing the direction
• In a ray diagram used to determine the position of an image in a mirror, where is the image located?

  Where the extended reflected rays meet
• Where can you find additional questions on reflection, according to the video?

  In the revision workbook
• What should you be able to describe by the end of this video?

  How to investigate reflection/refraction of light by different surfaces/substances
• What type of student is this practical required for?

  Triple physics students only
• What are we investigating in this practical?

  Reflection and refraction
• What three items are used to investigate reflection and refraction?

  Ray box, lens, and slit
• What does the ray box, lens and slit produce?

  A narrow ray of light
• Why is it important to switch off ray boxes when they are not being used?

  Because they get hot
• Why is a ray box safer than a laser for this practical?

  Lasers can be more dangerous
• What size paper do we use?

  A3 paper
• What do you draw down the center of the A3 paper using a ruler?

  A straight line
• What instrument is used to draw a line at right angles to the first line?

  A protractor
• What is the line at right angles to the first line called?

  The normal
• What do we label the normal as?


  n
• What do we place against the first line?

  A glass block
• Where should the normal be in relation to the glass block?

  Near the center
• What should you do to the lights in the room at this point?

  Turn them out
• What do you do after placing the glass block on the paper?

  Draw around the glass block
• What do we use to direct a ray of light so it hits the block at the normal?

  The Ray box
• What is the ray of light called that hits the block at the normal?

  The incident ray
• What is the angle between the incident ray and the normal called?

  The angle of incidence
• What happens at a certain angle of incidence?

  A ray reflects from the surface
• What is the ray called that leaves the block from the opposite side?

  The transmitted ray
• How do we mark the path of the incident and reflected rays?

  With crosses
• What do you do with the room lights after marking the paths of the rays?

  Turn them on