NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
while focusing a microscope on high power a student crushed the cover slip. The student probably
A
closed the diaphragm
B
turned up the light intensity
C
rotated the eyepiece
D
used the course adjustment knob
Explanation: 

Detailed explanation-1: -Use the Fine Focus Knob to bring the image into focus. When using 10x and 40x objectives, use ONLY the fine focus knob so that you don’t scratch a lens or break a slide. Always carry your microscope with one hand under the base and one hand on the arm.

Detailed explanation-2: -Answer and Explanation: The correct answer is a Fine adjustment knob.

Detailed explanation-3: -CAUTION: NEVER, EVER, use the coarse adjustment knob with the high power objective. This could break the lens.

Detailed explanation-4: -COARSE ADJUSTMENT KNOB-A rapid control which allows for quick focusing by moving the objective lens or stage up and down. It is used for initial focusing.

There is 1 question to complete.