\(\frac{1}{2}\)\(\theta\)
\(\theta\)
2\(\theta\)
3\(\theta\)
Correct answer is C
No explanation has been provided for this answer.
The image in a pin-hole camera is
errect and formed by refraction through a lens
virtual and formed by dispersion
erect and gets sharper as the hole becomes larger
inverted and formed by the light from each point travelling in a straight line
Correct answer is D
No explanation has been provided for this answer.
Which of the following is TRUE of light and sound waves?
they both transmit energy
they both need a mediumfor propagation
they are both transverse waves
their velocities in air are equal
Correct answer is A
No explanation has been provided for this answer.
0.14s
0.43s
2.32s
6.97s
Correct answer is C
Total time = (3 x 60) + 29
= 209sec
period \(\frac{t}{n}\) = \(\frac{209}{90}\)
= 2.32sec
convection
radiation
conduction
reflection
Correct answer is B
No explanation has been provided for this answer.