The curvature radius of a plano-convex lens (see figure) is |R|. Tell if this le

Question

The curvature radius of a plano-convex lens (see figure) is |R|. Tell if this lens, having any index n, is convergent or divergent. (Show algebraic calculation paying great attention to the signs) Ans: _____________ Light with lambda = 500 nm enters a glass with index n. The wavelength inside the glass could be: 500 nm 490 nm 510 nm In a diffraction grating the number of spots that can be obtained is. Unlimited limited An eagle has a bigger "resolving power" than humans because the eagle has a pupil with (smaller/bigger) ________ diameter than humans. A telescope has an objective focal length of 3.0 meters and its eyepiece has f = 15 mm. What is the magnification of the telescope? 0.2 20 200 5

Explanation / Answer

For question no 5:

Form the Formula: 1/f = (n-1){1/R1 -1/R2} = (n-1){ 1/infinity - (-1/R)} As radius for flat surface is infinity

1/f = (n-1){0 + 1/R) So, f comes out to be positive, so this lens will behave like convex ie convergent.

For question no 6, when light enters the glass its wavelength will be original wavelength/n. So inside glass wavelength should be less than 500 so it could be is 490.

For rest question please put seperately.

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