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Find the angle at which total internal refraction takes place when light is going from glass to air.

The angle at which this takes place is called the critical angle.

We can apply Snell's law in this situation: n₁sin C1 = n₂sin (90deg)

sin C = n₂/ n

Answered by Catherine T. • Physics tutor

2028 Views

Why can heat only be transferred through a vacuum by radiation, and not conduction or convection? (3)

Heat transfer by conduction and convection works by particles colliding and transferring energy, as there are no particles in a vacuum heat transfer can only occur by radiation. This is because radiati...

Answered by James W. • Physics tutor

38891 Views

Explain why an athlete, who has just run a marathon on a summers day, would have higher concentration of ADH (anti-diuretic hormone) in their blood.

The athlete is running a marathon, therefore their muscles are constantly contracting and therefore using up ATP (Energy). ATP is generated through respiration in cells in the human body. Respiration gene...

Answered by Aryan N. • Biology tutor

6387 Views

How do I structure my coursework/ exam essays? Do you have any other tips for essay technique?

APPROACHING ESSAYS:

FIRST APPROACH: Really try to think about and dismantle the question. What exactly are you being asked? What would you like to ...

Answered by Alice T. • English Literature tutor

9473 Views

'Explain how an act utilitarian would make a moral decision'

Act utilitarians assert that, when making morally relevant choices, on a case-by-case basis, consequences ought to be the only frame of reference for a moral agency. Thus, they uphold the primacy of the U...

Answered by Charlie M. • Philosophy tutor

3070 Views