Total internal reflection of light is possible when light enters from

$A$ transverse wave is described by the equation $y = y_0 \sin 2\pi \left( ft - \frac{x}{\lambda} \right)$. The maximum particle velocity is equal to four times the wave velocity if:

Which of the following statements is incorrect for $Nostoc$ and $Anabaena$?

Which of the following options is correct for an object having a straight-line motion represented by the following graph?

The distance between the pair of lines $x^2+2 \sqrt{2} x y+2 y^2+4 x+4 \sqrt{2} y+1=0$ is:

Which of the following is an aldohexose?