MCQ
The image which can be obtained on a screen is called:
- AA virtual image
- ✓A real image
- CEither a real or a virtual image
- DNeither a real nor a virtual image
The image which can be obtained on a screen is called a real image.
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Given $D = \ 1.5\ m$
$d = 3\ mm$
$4500 \ Å < \lambda_1 , \lambda_2 < 7000\ Å$
then $n, m$ and $\lambda_1$ are

${}_{92}{U^{235}} + {}_0{n^1} \to {}_{56}B{a^{141}} + {}_{36}K{r^{92}} + 3x + Q{\rm{( energy)}}$ where three particles named $x$ are produced and energy $Q$ is released. What is the name of the particle $x$ ?