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Median plane - Sagittal plane through the midline of the body; divides the body or any of its parts into right and left halves.
Answer:
Explanation:
Let the slide be at a distance of u from lens . So the object distance is u.
Image distance v = 13 - u .
Using lens formula
1/v -1/u = 1/f
1/ ( 13 - u) - 1 / u = 1 / 2.33
u - (13 - u )/u(13 -u ) = 1/2.33
2u - 13/ 13u - u² = 1/ 2.33
4.66 u - 30.29 = 13 u -u²
u² - 8.34 u - 30.29 = 0
u = -2.73 cm
So lens will be at a distance of 2.73 cm from the slide.
Answer: 133.33nm
Explanation: refractive index, n = real depth/apparent depth
Oil thickness= real depth = 200nm
Wavelength from under the water = apparent depth = a
n = real depth/a
1.5 = 200/ a
a = 200/ 1.5
a = 133.33nm