Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    2
    ReputationRep:
    Yeh it's question 22 part b need some help drawing the ray of light it says that the critical angle is less the 45 degrees but not sure where to start any help would be appreciated thanks Name:  ImageUploadedByStudent Room1365895392.101855.jpg
Views: 81
Size:  163.4 KB


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    (Original post by That_Clever_Guy)
    Yeh it's question 22 part b need some help drawing the ray of light it says that the critical angle is less the 45 degrees but not sure where to start any help would be appreciated thanks Name:  ImageUploadedByStudent Room1365895392.101855.jpg
Views: 81
Size:  163.4 KB


    Posted from TSR Mobile
    That's strange I posted a thread on the exact same question earlier today, still waiting for a reply hope to get one soon
    Offline

    20
    ReputationRep:
    Where did you get that? The diagram doesn't appear to correspond with the text. You should presume that the diagram and text will have been checked and do correspond in real exams.

    What you'd do for ray trace type questions do is draw a normal at the point the ray inside the prism meets the next surface and work out it's angle of incidence... It should be clear what to do based on your knowledge of snells law and critical angles.

    Refractive index of air is 1.00 unless the question says otherwise.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by Joinedup)
    Where did you get that? The diagram doesn't appear to correspond with the text. You should presume that the diagram and text will have been checked and do correspond in real exams.

    What you'd do for ray trace type questions do is draw a normal at the point the ray inside the prism meets the next surface and work out it's angle of incidence... It should be clear what to do based on your knowledge of snells law and critical angles.

    Refractive index of air is 1.00 unless the question says otherwise.
    This was in a revision pack from my sixth form thanks for your help it was the two prisms bit that confused me and thanks again


    Posted from TSR Mobile
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.