Answer:
(a). The thickness of the glass is 868 nm.
(b). The wavelength is 3472 nm.
Explanation:
Given that,
Refractive index = 1.20
Wavelength = 496 nm
Next wavelength = 386 nm
We need to calculate the thickness of the glass
Using formula for constructive interference

Put the value into the formula
In first case,
.....(I)
In second case,

.....(II)
From equation (I) and (II)



Put the value of m in equation (I)


The thickness of the glass is 868 nm.
(b). We need to calculate the wavelength
Using formula of constructive interference


Put the value into the formula


Hence, (a). The thickness of the glass is 868 nm.
(b). The wavelength is 3472 nm.
Answer:
b
Explanation:
When an object is in circular motion, the direction of velocity is in the direction of tangent to the circle and acceleration is always directed towards the radial direction. This means that velocity is always perpendicular to acceleration of the object.
Hence option (b)-The velocity and acceleration vectors are perpendicular is correct.
Answer a kind of radiation including visible light, radio waves,gamma rays,and x-rays,in which electric and magnetic fields vary simultaneously
Explanation:
Yes the winds are moving in a straight line
Answer:
infrared, visible and ultraviolet regions.
Explanation: