D,
lmk if this is right :)
Answer:
The second wavelength is 482 nm.
Explanation:
Given that,
Wavelength = 630 nm
Distance from central maxim = 0.51 m
Distance from central maxim of another wavelength = 0.39 m
We need to calculate the second wavelength
Using formula of width of fringe

Here, d and D will be same for both wavelengths
= wavelength
= width of fringe
The width of fringe for first wavelength
....(I)
The width of fringe for second wavelength
....(II)
Divided equation (I) by equation (II)




Hence, The second wavelength is 482 nm.
<span>Free electrons may be transferred between bodies by "Contact Action"
When positively charged body comes close to a negatively charged body, then electron flows from positively to negatively charged body
In short, Your Answer would be Option B
Hope this helps!</span>
The <span>asthenosphere is under the lithosphere.</span>