Question

29) Define the following terms. Give their SI unit. a) Period b) velocity c)
Frequency
Q.10) Describe the construction of an optical fibre.
Q.11) Thickness of the glass of a spectacle is 2 mm and refractive index of its glass is
1.5. Calculate time taken by light to cross this thickness.
Section D
Attempt any One
(04)
Q.12) For a prism prove that i te = A +6. where the symbols have their usual
meanings.
Q13) For a wave, show that wave velocity - Frequency x wavelength.
A man shouts loudly close to a high wall. He hairs an echo. F the man is at 41
m from the wall, how long after the shout will the echo be heard? (Speed of sound in
air = 330 m/s.)​

Answer 1

Answer:

Yo yo bae

Explanation:

Answer 2

Answer:

Oh god

What is this

sorry

idk

tc

bye

thanks

ask on google baba