limbiks_APZNZA~3.PDF (2) Flashcards
Name two natural sources of light
Sun, and Star
Give an example of a luminous object.
Candle fire
What is the name given to an object that does NOT emit light?
NON-LUMINOUS
Source Name: Incandescent
Description: Emission of Visible light by hot object. Example: Light bulb
Source Name: Fluorescent
Description: UV Light, electric current>heats mercury vapour> UV radiation. Example: Fluorescent tube
Source Name: Phosphorescent
Description: absorbed by phosphor glow, emission of light after exposure. Example: Inner surface of TVs
Source Name: Chemiluminescent
Description: energy released no chemical reactions. Example: Glow sticks
Source Name: Bioluminescent
Description: Chemicals run in the bodies of organisms. Example: Jellyfish
What transformations of energy occur when Tracy throws a beachball at Connor’s head?
Sound Energy, Kinetic Energy, Heat Energy
What happens when a large number of rays strike an object?
More rays are absorbed or deflected
How does light travel?
In straight lines
What causes a shadow?
Refraction of light
What is the relationship between the angle of incidence and the size of the shadow?
Larger angle = smaller shadow
What type of light source creates a sharp shadow?
Small source
What results in a fuzzy shadow outline?
Large source
What relationship is noted in Tuesday’s lab regarding rays and the normal?
Same plane
How far away does Zulfiyya’s image appear to be from the mirror?
10 cm
What type of mirror makes an object appear larger and upright when close?
CONCAVE MIRROR
What happens to the image when the object is further away from a concave mirror?
SMALLER AND INVERTED
What type of mirror did Spencer see himself in?
Convex mirror
What is another use for a convex mirror?
Good security device
What do convex mirrors allow you to see?
Large area
