Chapter 12: Light

Objects that do not allow any light to pass through them are called

• Opaque objects

• Transparent objects

• Translucent objects

A shadow forms when an...........blocks light

• Opaque

• Transparent

• Translucent

Substraction is a process that occurs when a coloured light which has the same colour with an opaque object is reflected back to our eyes while other colours are absorbed.

• True

• False

 Which of the following are primary colours ?

• Red

• Green

• Blue

• All of the mentioned

A black surface object ---------- light ?

• Reflects

• Absorbs

How many light spectrum are produced from white light ?

• 5

• 7

• 10

• 6

Which of the following is true about refraction.

• Refraction of light bending of light in the same medium.

• Refraction of light bending of light in the two different medium.

• Refraction of light bending of light in liquid medium only.

When light travels from glass to air medium the light reflects towards the normal line.

• True

• False

Which colour of the spectrum is refracted most by a prism?

• Red

• Yellow

• Violet

• Indigo

Which colour of the spectrum is refracted least by a prism?

• Red

• Violet

• Yellow

• Indigo