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powerpoint questions
Question | Answer |
---|---|
What is the law of reflection? | The relationship between the angle of incidence and the angle of reflection, they must equal each other. |
Which types of mirrors are flat and produce only virtual images? | Plane mirrors. |
How can one tell the difference between a virtual and a real image? | A virtual image is always upright while a real image is inverted or upside down. |
A concave mirror curves in and its image is larger and farther away. How is a convex mirror shaped and what does it's image look like? | A convex mirror is curved outward and its image is smaller and closer than the object is in real life. |
What kind of mirrors are convex mirror? | Security mirrors and traffic mirrors are both convex mirrors. |
What is diffuse reflection? | Diffuse reflection is the reflection of light from a rough surface. |
What happens to sound energy that is not reflected? | The sound energy is absorbed or transmitted. |
Why are grooves designed into the walls of a concert hall? | The grooves in the wall help the sound waves to be diffused. |
What happens when walls are to reflective? | The sound becomes garbled because of multiple reflections which is called reverberations. |
What is very important in the design of an auditorium or concert hall? | A balance between reverberation and absorption. |
How is light reflected from a smooth mirror? | Light reflect from a smooth mirror in only one direction, in an orderly pattern. |
What happens when light is incident on a rough surface? | The light is reflected in many directions. |
What does it mean if light rays diverge? | It means that the light rays spread apart. |
What is the name of the line perpendicular to where the incident ray strikes? | The normal. |
Which angle is formed between the incident ray and the normal? | The angle of incidence. |