Back to the full dot-point answer
EnglandPhysicsQuick questions
Waves and the particle nature of light
Quick questions on Refraction and diffraction: Snell's law, critical angle and gratings - Edexcel A-Level Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the diffraction grating?Show answer
A diffraction grating has many thousands of fine, equally spaced slits, producing very sharp, bright maxima:
What is q1?Show answer
Define the refractive index of a medium. [1 mark]
What is q2?Show answer
A glass has refractive index . Find its critical angle in air. [2 marks]
What is q3?Show answer
Explain why a diffraction grating gives sharper maxima than a double slit. [2 marks]
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.