Separate Light Sources from Reflectors - Practice 2

A light source emits visible light of its own in the stated situation.

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A light source emits visible light of its own in the stated situation. A reflector is seen by light arriving from elsewhere. Do not look directly at the Sun or into bright lamps.

Worked example

An illuminated bulb emits light. A book under that bulb reflects some of the light reaching it.

A lamp emits light toward a book. A second arrow goes from the book toward an eye, representing reflected light. Seeing the book does not make it a source of its own visible light.

Would you believe it?

The Moon shines in our sky mainly by reflecting sunlight. Being bright to our eyes does not mean an object makes its own visible light.

Question 1 In this description, is a shining LED in a closed circuit a light source or a reflector? no light possible source reflector only

Question 2 In this description, is a mirror reflecting a room lamp a light source or a reflector? reflector source of its own light no light possible

Question 3 In this description, is a star seen at night a light source or a reflector? reflector only no light possible source

Question 4 In this description, is a road sign lit by headlights a light source or a reflector? no light possible reflector source of its own light

Question 5 In this description, is a lit flashlight bulb a light source or a reflector? source reflector only no light possible

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