Question

Marks: - 25
Section A
01) Select and write the correct answer from the given alternative.
1) Speed of sound is maximum in
a) ar b) water c) vacuum di solid
in) Which of the following is not involved in the formation of rainbow?
a) refraction b) angular dispersion
afigular deviation d) total internal reflection
111) The walls of the hall built for music concerts should
a) amplity sound b) reflect sound c) transmit sound absorb sound,
iv) Time taken by light to cross a glass slab of thickness 4 mm and refractive index 3
a) 4 x 10
b) 2x101
c) 16-101's
d) 8 - 1011s.
Alfa
(03)​

Answer 1

Explanation:

chgDChhalf dynamic snappy12+8=93πdgin

Answer 2

Answer:

1) (c) Vacuum

2) (d) Total Internal Reflection

3) (b) Reflect sound

4) I don't know the answer and method to solve

Please mark it as brainliest!!