4. You see swimming goggles at the bottom corner of a pool when you look down at

Question

4. You see swimming goggles at the bottom corner of a pool when you look down at the pool's surface at an angle of 60o below horizontal. The goggles appear to be 1.00 m underwater. How deep is the water? (nwater 1.33) a) 1.00 m 30 60 b) 2.03 m 0.49 m 73 d 0.70 m. e) 1.43 m. 5. A concave spherical mirror has a focal length f. At what position s of the object will the image have magnification M 2? a) M 2 is not possible 3f/2 s f/2 2 3f/2 6. For a convex spherical mirror, the image a) is real and upright. b) is real and inverted. is virtual and upright. is virtual and inverted. e) does not exist. 7. In a double-slit experiment, the two slits are spaced 0.1 mm apart, and a screen is at a distance of 1.0 m. If yellow light with a wavelength of 600 nm is used, what will be the spacing between adjacent bright lights? (Assume the angle is small a) 6 mm b) 12 mm c) 60 mm. d) 1.0 mm. e) 0.16 mm

Explanation / Answer

(b)

from the magnification equation

M = -2

-q/p = -2

q= 2p

1/f = 1/p + 1/q

1/f= 1/p + 1/ 2p

1/f = 2P + P/ 2p^2

f= 2p^2/3p

= 2P/3

P = 3f/2

obtion ( b) is correct answer

6)

option (c) is correct answer

7)

d sin theta = m lamda

d ( y/L) = m lamda

d ( y1/L) =1* lamda

d ( y2/L) =2* lamda

d ( y2/L)-d ( y1/L)= lamda

y2- y1 = lamda * L/ d

=600 * 10^-9 m * ( 1.0 m)/0.1 * 10^-3 m

=6 mm

option (a) is correct answer

As per guide lines I worked three problems

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