Monochromatic light (2 = 632.8 nm) from a helium-neon laser shines at a right angle onto the surface of a diffraction grating tha
contains 531 001 lines/m. Find the angles at which one would observe the first-order and second-order maxima.
a. 6. = 19.639; 62 = 39.26°
c. 6) = 21.10°; 6: = 42.20°
b. 61 = 19.63°; 62 = 42.20°
d. 61 = 33.60°; 62 = 67.200

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

it is b. absorbs thermal energy