FeaturesHow It WorksFor ParentsPricingContactLog inStart free — no credit card needed →

Physics · Unit 4 · Quantum theory · Quantum theory

Explain how the double slit experiment provides evidence for the wave model of light.

Practise this objective

AI-marked practice questions tied to QCAA mark schemes for this exact LO. Free to start.

Start free practice

Practice questions for this objective

Full questions, answers and worked solutions unlock when you start a free practice session.

Question 1

A monochromatic laser with wavelength \(632\) nm is directed at two narrow slits separated by \(0.150\) mm. A screen is placed \(2.50\) m behind the slits, and a pattern of bright and dark regions is observed. Explain how this experimental observation provides evidence for the wave model of light.

Worked answer
🔒 Start free to see full answer
Question 2

When coherent monochromatic light passes through two closely spaced slits and forms an interference pattern on a distant screen, this observation is best explained by which of the following?

Worked answer
🔒 Start free to see full answer
Question 3

In a double slit experiment, monochromatic light produces a clear interference pattern on a distant screen. Which observation provides the strongest evidence that light behaves as a wave rather than as a stream of particles?

Worked answer
🔒 Start free to see full answer
Unlock all 3 answers — free

More in Quantum theory

← Previous
Explain how Bohr’s model of the hydrogen atom integrates light quanta and atomic energy states to explain the specific wavelengths in the hydrogen line spectrum.
Next →
Explain the concept of black-body radiation and the significance of the evidence it provides.
All LOs in Quantum theoryBack to full Physics syllabus