Microscope

Q.

What is tunneling microscopy?

Q. The source of illumination for an electron microscope is ________.

1. solar energy
2. infrared rays
3. UV rays
4. beam of high accelerated electrons.

Q. Microscope-I : It has a high resolution of $0.25A$ and can be used to observe very small organelles like ribosomes.
Microscope-II : It is used to observe various stained specimens but does not resolve very small specimens, such as viruses.
Select the correct option for the scientists who discovered the microscopes-I and II.
$\begin{array}{cc}\text{Microscope-I}& \text{Microscope-II}\\ \text{(i) Zernike}& \text{Edward Jenner}\\ \text{(ii) Knoll and Ruska}& \text{Rudolf Virchow}\\ \text{(iii) Z. Janssen}& \text{Zernike}\\ \text{(iv) Knoll and Ruska}& \text{Z. Janssen}\end{array}$

1. (iv)
2. (ii)
3. (iii)
4. (i)

Q.

*Write two main differences between the compound microscope and electron microscope.

Q. Objects which cannot be seen by naked eyes are observed through a ______.

1. glass
2. telescope
3. microscope
4. (b) and (c) above.