Question

answer all these today​

Answer 1

Answer:

.......,..

Explanation:

...........

Answer 2

Answer:

1.

Explanation:

We wil denote V as frequency and W as wavelength

$1. \: w = \frac{c}{v}$

where c is speed of light in air its value is

$3 \times {10}^{8 \: \:} \: m {s}^{ - 1}$

$w = \frac{3 \times {10}^{8} }{6.9 \times {10}^{ - 13} }$

$w = 0.43 \times {10}^{21} \: m$

$2. \: w = \frac{c}{v}$

$w = \frac{3 \times {10}^{8} }{2.99}$

$w = 1.00 \times {10}^{8} \: m$

$3.) \: w = \frac{3 \times {10}^{8} }{1.28 \times {10}^{17} }$

$w = 2.34 \times {10}^{ - 9} \: m$

$4.) \: v = \frac{3 \times {10}^{8} }{7.43 \times {10}^{ - 5} }$

$v = 0.4 \times {10}^{13}$

$5.) \: w = \frac{3 \times {10}^{8} }{26}$

$w = 0.115 \times {10}^{8} \: m$

$6.) \: w = \frac{3 \times {10}^{8} }{4.34 \times {10}^{15} }$

$w = 0.69 \times {10}^{ - 7} \: m$

$7.) \: w = \frac{3 \times {10}^{8} }{109.6 \times {10}^{6} }$

$w = 0.0273 \times {10}^{2} \: m \: or \: w = 2.73 \: m$

Note i had started writing questions from serial no. 1 so please dont confuse and mark as brainliest

if this helps