HARD
12th Andhra Pradesh Board
IMPORTANT
Earn 100

Explain in brief the formation of a secondary rainbow.

Important Questions on Ray Optics and Optical Instruments

EASY
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 53
Dose total internal reflection take places in a rainbow ?
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 54
Draw ray diagram to illustrate formation of primary rainbow (using single water drop only and a single incident-ray, to show clearly refraction and total internal reflection, use at least four arrows).
HARD
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 55
Explain the formation of rainbow.
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 56
A small telescope has an objective lens of focal length 144 cm and an eyepiece of focal length 6.0 cm. What is the magnifying power of the telescope? What is the separation between the objective and the eyepiece?
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 57
The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification?
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 58

Why must both the objective and the eyepiece of a compound microscope have short focal lengths?

EASY
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 59
How we can increase the magnifying power of a compound microscope?
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Ray Optics and Optical Instruments>Exercise>Q 60
In viewing through a magnifying glass, one usually positions one’s eyes very close to the lens. Does angular magnification change if the eye is moved back?