Physics

3.00 x 10⁸ms^-1

2.46 x 10⁸ms^-1

1.57 x 10⁸ms^-1

1.32 x 10⁸ms^-1

1.11 x 10⁸ms^-1

i only

iii only

i and ii only

i and iii only

ii and iii only

5.22cm

5.24cm

5.26

5.35

ionization

excitation

field emission

photoemission

thermonic emission

X = Y - 1

X = Y + 1

X = 1 - Y

X = \(\frac{1}{y}\)

X = Y