ExpertEasy1 markMultiple Choice
AQA GCSE · Question 06.2 · Waves
Which of the following values is a wavelength of red light?
Which of the following values is a wavelength of red light?
Answer options:
A.
320 nm
B.
410 nm
C.
690 nm
D.
750 nm
How to approach this question
1. Look at the diagram to find the range for "Visible light". It is between 400 nm and 700 nm.
2. Recall the order of colours in the visible spectrum (ROYGBIV - Red, Orange, Yellow, Green, Blue, Indigo, Violet). Red has the longest wavelength and Violet has the shortest.
3. Identify which of the options is a value between 400 nm and 700 nm, and is closest to the 700 nm end.
Full Answer
C.690 nm✓ Correct
690 nm
The diagram shows that visible light has wavelengths between 400 nm and 700 nm. Within the visible spectrum, red light has the longest wavelength and violet light has the shortest.
- 320 nm is in the ultraviolet range.
- 410 nm is in the visible range, but it's close to 400 nm, so it would be violet or blue light.
- 690 nm is in the visible range and is very close to 700 nm, making it red light.
- 750 nm is in the infrared range.
Common mistakes
✗ Misreading the diagram and choosing a value outside the 400-700 nm range.\n✗ Forgetting that red light has a long wavelength and violet has a short wavelength.
Practice the full AQA GCSE Physics Foundation Tier Paper 2
63 questions · hints · full answers · grading
More questions from this exam
Q01.1A group of stars is called a galaxy. What is the name of our galaxy?EasyQ01.2The Sun is one of the stars in our galaxy. What was the Sun originally formed from?EasyQ01.3Which of the following forces was involved in the formation of the Sun?EasyQ01.4Stars produce light because they release energy. Complete the sentence. Choose the answer from th...EasyQ01.5Visible light and infrared radiation travel from the Sun to the Earth. Which statement describes ...Easy