Question

1) Answer the following
(i) How much energy is transferred when I gm. of boiling water at
100°C condenses to water at 100°C?
(ii) How much energy is transferred when I gm. of boiling water
at 100°C cools to water at 0°C?
(iii) How much energy is released (or) obsorbed when I gm. of
water at O'C freezes to ice at 0°C?
(iv) How much energy is released (or) obsorbed when I gm. of
steam at 100°C turns to ice at O'C?
(i) Suppose that 1 litre of water is heated for a certain time to rise
and its temperature by 2°C. If 2 litres of water is heated for the
same time, by how much will its temperature rise?
(ii) If you are chilly outside the shower stall why do you feel warm
after the bath if you stay in the bathroom?
3) (i) The absolute refractive index of water is 4/3. What is the
critical angle?
(ii) Determine the refractive index of benzene if the critical angle is 42°?
"Bhargavi" able to read the printed letters text book, but unable
10 read the letters on the black-board for away from her.
(i) Which type of eye defect she is suffering from?
(ii) Which type of lens is used to correct the defect?
(iii) Derive the formula for focal length of that lens.
5 Find the refractive index of the glass which has symmetrically
convergent lens if its focal length is equal to radius of cur-
vature of its surface?
6) Draw ray diagrams for the following positions explain the
nature and position of image object is placed at.
(i) () infinity: (ii) beyond 'e': (iii) at C:
(iv) Between C & F: (v) at F:
(vi) Between F and optic centre.

plz answer!!

thanks in advance!!​

Answer 1

this is answer of ur 1st question....

thank you...

Answer 2

Answer:

.

........thanks ........

Explanation:

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