Question

(i) Calculate the energy, in electron volts, of a photon whose frequency is the following. frequency (Hz) energy (EV) 1.30 x 104 6.40 x 105 4.70 x 107 (ii) Determine the corresponding wavelengths for the photons listed in part (). frequency (Hz) wavelength (m) 1.30 x 104 6.40 x 105 4.70 x 107 (ill) State the classification of each on the electromagnetic spectrum. frequency (Hz) classification 1.30 X 104 -Select- 6.40 x 105 -Select- 4.70 x 107 ---Select---

Answer 1

Am Page No. _ Date ca © f= 1:30 X10' Ha so Energy E=ht E = 6,636 X1039 x 130x10 E = 8.6268 XTOS OJ = 8.6268 X1030 1.GX1019 E = 5.39 X 10 sev C1 f = 6.40 X 10 Hz E=hf E=6.636210 X6.40 xlo - 29 E-42.4704 X10 T E=26.544 X 10 ev f = 4.70 X1 ot Hz Ezhf E=6636 X184x4.70x16 E = 31./892x1024 (E = 19.49 x 10 ev

Page No. Date ' f = 1.30x10 Hz a = 3x108 ms 8 x = 1.30xio9 c = 3 X 10 in t=2130 x109 m f = 6.40 X 10 Hz C = 3X108 mys - =[ = 3x10 | 640 x 105 A = 0.46875 x103 T7 = 4.6875x10² m = 4.70 X 10 Hz C = 3 X 10 me - 3XIO 4.70 X 107 = 6.38 m | 6.38 m (c) all the waves are radio waves
in part C) I can not see what is given in options....but all these frequency comes under radio waves..part A) & part B) I have done right. thank you so much....all the best for upcoming exams Dear student...?