Answer:
The value is
Explanation:
From the question we are told that
The power is
The wavelength is
Gnerally the number of photon produced is mathematically represented as
Here is the Planck's constant with a value
c is the speed of light with value
So
=>
Answer: 65000 × (0.08 × 200 × 0.004) ÷ (800 × 300) = .0
Explanation: .08 × 200 = 16
65000 × (16 × 0.004) ÷ (800 × 300)
16 × .004 = .064
65000 × (.064) ÷ (800 × 300)
65000 × .064 ÷ (800 × 300)
65000 × .064 = 4160
4160 ÷ (800 × 300)
800 × 300 = 240000
4160 ÷ (240000)
4160 ÷ 240000
4160 ÷ 240000 = .01733333333333333
.01733333333333333
Round .01733333333333333 → .00[[]] (Sig Figs: 1)
So I would say (a) water isn't always wet; wetness is always relative to a given substance and/or type of surface and (b) as to why it is wet when it is, presumably the answer is in terms of surface tension.
C) is the correct answer.