Y8 6.2 How do we see things?

If Light is given out by an object (like the Sun) we say the light has been .............

The Sun is a luminous object

• True

• False

Answer explanation

It is in fact the most luminous object in the Solar system

Which of these are examples of NATURAL sources of light? (select all that are true)

• Sun

• Stars

• Lightning

• Flames

What causes shadows?

• An object blocking the light source

• The water cycle

• An object letting the light source through

• The moon

Light is absorbed by an object if the light hitting the object neither reflects nor transmits through the object

• True

• False

Answer explanation

There are very few objects that absorb 100% of the light hitting (or incident upon) them .

Lux is a measure of

• Soapyness

• Light energy hitting a certain area per second.

• Luxury

Which of these items is translucent?

• 
• 
• 
• 

Black is a real colour (of light)

• True

• False

Answer explanation

Black items do not reflect visible light - they represent an absence of light.

The first part of the eye that light hits. 

• lens
• cornea
• pupil
• retina

Lets the light in and it is the black portion of eye.

• pupil
• retina
• lens
• cornea