A light wave travels through water (n = 1.33) at an angle of 35°. What angle does it have when it passes from the water into the glass (n = 1.5)?

a) 0.509
b) 40.3
c) 30.6
d) 0.647

please help me

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Avoltaic cell converts chemical energy to

which pair of rays would be part of a ray diagram showing reflection? - a & b which pair of rays would be part of a ray diagram showing refraction? c & a