Orange light has a wavelength of 585 nm. calculate the frequency and energy of the orange light.

3.4 x 10⁻¹⁹J

Explanation:

Given parameters:

   Wavelength  = 585nm

Unknown:

 Frequency and energy of the wave = ?

Solution:

The frequency of the wave can be derived from;

        C = f x wavelength

c is the speed of light  = 3 x 10⁸m/s

f is the frequency

  Insert the parameters and solve;

         3 x 10⁸  = f x 585 x 10⁻⁹

          f =

       f  = 5.13 x 10⁻³ x 10¹⁷   = 5.13 x 10¹⁴m⁻¹

the energy of the wave;

   E = hf

 h is the planck's constant;

  E = 6.63 x 10⁻³⁴ x 5.13 x 10¹⁴   = 34.01  x 10⁻²⁰J or 3.4 x 10⁻¹⁹J

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.