Light

Light

Multiple Choice

Which sweater absorbs the most light?

Multiple Choice

which object transmits light?

Multiple Choice

Which object reflects light?

Multiple Choice

What does luminous mean?

• emits light

• reflects light

• absorbs light

• disperses light

Multiple Choice

When an object is described as opaque, what does it mean?

• object reflects light that hits it

• object does not allow light to pass through it.

• object allows light to transmit through it

• object partially allows light to be transmitted through it

Multiple Choice

What does translucent mean?

• objects that let light transmit all the way through.

• objects that do not allow any light through

• objects that let some light through, but not enough to allow us to see objects clearly.

Open Ended

Give an example of a luminous object

Electromagnetic Spectrum

Light travels as a transverse wave from the Sun

Multiple Choice

Which colour has the longest wavelength?

• Red

• Blue

• Green

• Indigo

Multiple Choice

Which colour is refracted least by a glass prism?

• Red

• Green

• Yellow

• Orange

Multiple Choice

Which is not a primary colour?

• Red

• Blue

• Magenta

• Green

Multiple Choice

Which two primary colours make magenta?

• Red Blue

• Blue Green

• Red Green

• Red Yellow

Multiple Choice

What colour would a red dress look in Cyan light

• Red

• Green

• Black

• Blue

Reflection

• A ray diagram shows how light travels, including what happens when it reaches a surface. In a ray diagram, you draw each ray as:

  a straight line with an arrowhead pointing in the direction that the light travels

Law of Reflection

• The law of reflectionWhen light reaches a mirror, it reflects off the surface of the mirror:

  the incident ray is the light going towards the mirror the reflected ray is the light coming away from the mirror

• The angle of reflection equals the angle of incidence

Using reflection

What is this?

Multiple Choice

At what angle should the mirrors be placed in a periscope?

• 90 degrees

• 45 degrees

• 50 degrees

• 35 degrees

Multiple Choice

Which image shows dispersion, refraction and reflection?

Open Ended

Explain what is happening that indicates dispersion, refraction and reflection

Open Ended

What is wrong with this picture?

Multiple Choice

Select the medium that is less dense than the others

• air

• glass

• water

• perspex

Multiple Choice

Which part of light has the longest wavelength?

• Radio waves

• infra red

• ultra violet

• gamma rays

Multiple Choice

Which part of the EMS do we use to 'see' objects

• infra red

• visible light

• x-rays

• microwaves