Electromagnetic waves

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Question 20
Easy

Figure 1 shows the wavelengths of some types of electromagnetic radiation.

Figure showing the electromagnetic spectrum around the visible region. A horizontal scale bar labeled "Wavelength in nm" has markings at 100, 400, 700, and 1000. The region from 100 nm to 400 nm is labeled "Ultraviolet". The region from 400 nm to 700 nm is labeled "Visible light". The region from 700 nm to 1000 nm is labeled "Infrared".

a.

Suggest one device or material that can be used to detect ultraviolet radiation.

[1]
b.

Which of the following values is a wavelength of violet light?

  • 350 nm350\text{ nm}350 nm
  • 410 nm410\text{ nm}410 nm
  • 550 nm550\text{ nm}550 nm
  • 750 nm750\text{ nm}750 nm
[1]
c.

A certain digital camera sensor (with its infrared-cut filter removed) can detect electromagnetic radiation with wavelengths between 350 nm350\text{ nm}350 nm and 950 nm950\text{ nm}950 nm. Give two ways the radiation detected by this camera sensor is different from the radiation detected by human eyes.

[2]
d.

Complete the sentences. Choose the answers from the box:

| absorbed | emitted | reflected | refracted |

When sunlight shines on a blue book, the blue light is ____________.

All other colours of light shining on the blue book are ____________.

[2]
e.

A student looks at the blue book through a red filter. How does the book appear to the student?

  • Black
  • Blue
  • Green
  • Red
[1]
f.

The student also looks at their reflection in a highly polished, very smooth silver mirror. What type of reflection happens at this very smooth surface?

[1]

Electromagnetic waves Questions

  1. GCSE
  2. /Physics
  3. /Electromagnetic waves