please check these for me: If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed

please check these for me: If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed

please check these for me:
If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?a. both would be laterb. both would be earlierc. sunrise would be later, and sunset would be earlierd. sunrise would be earlier, and sunset would be later
C
Interference effects observed in the early 19th century were instrumental in supporting a concept of the existence of which property of light?a. polarizationb. particle naturec. wave natured. electromagnetic character
C
The acronym laser stands for light amplification by ___ emission of radiation.a. similarb. simultaneousc. spontaneousd. stimulated
D
Both insulators and conductors can be charged bya. groundingb. inductionc. polarizationd. contact
D
Two point charges, initially 1 cm apart, are moved to a distance of 3 cm apart. By what factor do the resulting electric and gravitational forces between them change?a. 9b. 3c. 1/3d. 1/9
D
Electric field strength depends ona. charge and distanceb. charge and massc. Coulomb constant and massd. elementary charge and radius
D

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