Ver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 relative to the normal. if the index of refraction of water and glass are 1.33 and 1.5, respectively, at what angle (in degrees) does the light leave the glass (relative to its n

Explanation:

according to snell's law

refractive index of water n_w is 1.33

refractive index of glass  n_g  is 1.5

now applying snell's law between air and glass, so we have

we know that

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5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000