MYTUTOR SUBJECT ANSWERS

382 views

When red light is shone on a metal, regardless of the intensity of this light, no current will flow. However if blue light is shone on this metal a current will flow. Why does this occur?

This problem can be solved by first considering the energy of a photon e = hf. ​A photon of red light lacks the sufficient energy to free an electron. However a photon of blue light has a higher frequency and thus has a higher energy. This allows for a photon of blue light to free an electron and thus allow for a current to flow when a large number of photons are sent towards the metal.

Jonathan P. A Level Physics tutor, GCSE Physics tutor, A Level Maths ...

1 year ago

Answered by Jonathan, an A Level Physics tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

82 SUBJECT SPECIALISTS

Sam C. GCSE Maths tutor, 13 Plus  Maths tutor, 11 Plus Maths tutor, A...
£20 /hr

Sam C.

Degree: Physics (Masters) - Oxford, Trinity College University

Subjects offered:Physics, Maths+ 2 more

Physics
Maths
.PAT.
-Oxbridge Preparation-

“Maths and Physics hold the tools to unravelling the mysteries of the universe! I hope you enjoy unlocking these tools as much as I do!”

£22 /hr

Jonathan P.

Degree: Physics (Masters) - Durham University

Subjects offered:Physics, Maths

Physics
Maths

“About Me: I am a Physics student at Durham University. My passion is physics, and by association maths, I will aim to instil asimilar passion in students during my tutorials. I am a highly patient and approachable individual.  I have...”

£22 /hr

Dan B.

Degree: MPhys Physics (Masters) - Exeter University

Subjects offered:Physics, Maths

Physics
Maths

“Hi I'm Dan and I'm in the first year of a four-year MPhys Physics degree at the University of Exeter. I am very patient and will tailor the sessions' content and pace to suit your individual needs...”

About the author

£22 /hr

Jonathan P.

Degree: Physics (Masters) - Durham University

Subjects offered:Physics, Maths

Physics
Maths

“About Me: I am a Physics student at Durham University. My passion is physics, and by association maths, I will aim to instil asimilar passion in students during my tutorials. I am a highly patient and approachable individual.  I have...”

You may also like...

Other A Level Physics questions

Outline the principal features of a geostationary orbit and use them to explain one use of satellites in this type of orbit.

What are the postulates of special relativity?

How does a thermal nuclear reactor work?

Please see below.

View A Level Physics tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok