what Is the index of for this Work of quartz Find the critic

what Is the index of for this Work of quartz? Find the critical angle for light traveling from glycerine (n = 1.473) into air. Answer In units of degree. Why is the image projected onto the hack of the retina in your eyes upside down? The local length of the eye is wry long None of these The qutatkm doesn\'t make mw; with constant speed the train would have to move in a straight line. A little boy and little girl in a playground arc sitting on a large metal disk which Is rotating freely at a connta/it number of revolutions per minute. The boy is at the outer rim. and the girl is about halfway between the rim and the center. How do their accelerations compare? The girl \'s acceleration is greater. Both boy and girl have the same acceleration. Calculate the speed at the edge of diac of radius 8 cm that rotates at the rate of 5 rev/s. Answer in units of m/s.

Solution

001). Applying Snell\'s law,

ni sin@i = nr sin@r

1 * sin63.5 = 1.52 sin@r

@r = 36.07 deg

002) ni sin@i = nr sin@r

1 * sin30.4 = nr sin20.8

nr = 1.425

003) for critical angle,

@r = 90 deg

1.473 * sin@c = 1 * sin90

sin@c = 1 / 1.473

@c = 42.76 deg

004) eye is diverging lens/

005) angular speed is constant say w.

then a_c = w^2 r

so distance is more then acc. will be more.

Ans ( 5)

006)

a_c = v^2 / r

8 = v^2 / 0.5

v = 2 m/s

Ans(5)

007)

v = w . r

w = 5 rev/s =5 x 2pi rad/s = 31.42 rad/s

v = 31.42 x 0.08 = 2.51 m/s