MEDIUM
12th ICSE
IMPORTANT
Earn 100

Why is the power of the objective lens of a telescope is kept as small as possible?

Important Questions on Optical Instruments

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 10
State any one advantage of using a reflecting telescope in place of a refracting telescope.
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 11

In which, microscope or telescope, is the difference in focal lengths of the objective and the eye-piece smaller?

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 12

The resolving power of normal human eye is 1’ (one minute). Explain its meaning.

HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 13
On what factors does the resolving limit of a telescope depend?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 1

Using a ray-diagram, show the image formation by a simple microscope (magnifying glass). What is the nature of the image?

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 2

What is the difference between linear magnification and angular magnification (also called magnifying power) produced by a lens?

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 3

Why is, in a microscope, objective lens of a small aperture is taken?

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 5 - Optical Instruments>QUESTIONS>Q 4

Draw ray-diagram to illustrate formation of image in a compound microscope.