(A) Increasing focal length of the lens
(B) Decreasing focal length of the lens
(C) Lens of large aperture
(D) Lens of short aperture
Q. Instruments that use electromagnetic radiation to image objects are called:
(A) X-ray Microscopes
(B) Electric Microscopes
(C) Magnetic Microscopes
(D) None of these
Q. The most common and the first invented microscope is:
(A) Electron Microscope
(B) X-ray Microscope
(C) Optical Microscope
(D) None of these
Answers:
1. (B) Decreasing focal length of the lens
2. (A) X-ray Microscope
3. (C) Optical Microscope