Adiffraction grating that has 4500 lines/cm is illuminated by light that has a single wavelength. if a second order maximum is observed at an angle of 42° with respect to the central maximum, what is the wavelength of this light?

The wavelength is 742.7 nm.

Explanation:

Given that,

Grating = 4500 lines/cm

Angle = 42°

Order number =2

We need to calculate the distance

We need to calculate the wavelength

Using diffraction formula

Hence, The wavelength is 742.7 nm.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.