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Which among the following is true about Total Internal Reflection?

A. A ray passing from rarer to denser medium and not able to pass to denser medium at an angle greater than critical angle
B. A ray passing from denser to rarer medium and not able to pass to rarer medium at an angle greater than critical angle
C. A ray passing from either denser to rarer medium or rarer to denser medium and not able to pass any medium at an angle smaller than critical angle
D. None of the above
✅ The correct answer is option B.

Which among the following is true about latent heat ?

A. It causes change in temperature as well as change in state or phase
B. It causes change in temperature only
C. It causes change in state or phase but not in temperature
D. It causes change in Pressure
✅ The correct answer is option C.

Which among the following is a property of Insulator?

A. The electrons of the outer orbits are loosely bound to the nucleus , however can not flow through them
B. The electrons of the outer orbits are tightly bound to the nucleus and can not flow through them
C. The electrons of the outer orbits are loosely bound to the nucleus , and can flow through them
D. None of the above
✅ The correct answer is option B.
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