Answer:
A
B
Explanation:
From the question we are told that
The wavelength is
The angle of first bright fringe is
The order of the fringe considered is n =1
Generally the condition for constructive interference is
=>
=>
Converting to cm
Generally the number of grating pre centimeter is mathematically represented as
=>
=>
Considering question B
From the question we are told that
The first wavelength is
The second wavelength is
The order of the fringe is
The grating is
Generally the slit width is mathematically represented as
=>
=>
Generally the condition for constructive interference for the first ray is mathematically represented as
=>
=>
=>
Generally the condition for constructive interference for the second ray is mathematically represented as
=>
=>
=>
Generally the angular separation is mathematically represented as
=>
=>
The red box must way more. Gravitational potential energy is the product of a an objects mass times the acceleration due to gravity (which is constant on earth) times its height. Since the objects are on the same shelf they are at the same height, and since gravitational acceleration is constant as long as we stay on planet earth, then the mass is the only possible thing that could have changed. This means that the red box must weigh more than the blue box.
Since 1 examiner = 10^18miner
then 10^10miners =10^(10-18)=10^-8examiner
light is "visible". thermal can be infrared just beyond visible