true

Take Class 12 Tuition from the Best Tutors

• Affordable fees
• 1-1 or Group class
• Flexible Timings
• Verified Tutors

Search in

# Important Questions to revise for Clasx XII - Ray Optics and Wave Optics

Parul M P.
12/02/2020 0 0

Why does the intensity of the secondary maximum become less as compared to the central

maximum?

2. State the reason, why two independent sources of light cannot be considered as coherent

sources?

3. A biconvex lens has a focal length 2/3 times the radius of curvature of either surface. Calculate

the refractive index of lens material.

4. Draw a ray diagram of astronomical telescope in general adjustment. Write an expression

for its magnifying power.

5. Why does Sun appear reddish at Sun set or Sun rise?

6. Draw a labeled diagram of Newtonian type telescope. Write its one advantage over

refracting type telescope.

7. Derive the lens formula for biconvex lens. How is the approximate value of the focal length of

such a lens estimated in the laboratory?

8. An object is placed at (i) 10 cm; (ii) 5cm in front of a concave mirror of radius of curvature 15

cm. find the position, nature, and magnification of the image in each case.

9. State Huygens’s wave theory and using it prove the Snell’s law for refraction.

10. Derive an expression for magnifying power of compound microscope with a labeled diagram.

11.A compound microscope consists of an objective lens of focal length 2 cm and eyepiece of focal

length 6.25cm separated by a distance of 15 cm. How far from the objective should an object be

placed in order to obtain the final image at (a) the least distance of distinct vision (25cm), (b)

infinity? What is the magnifying power in each case?

12 Write the names of defects of human eye with ray diagram of their correction.

13 A right angled glass prism forms images of a small straight object which are deviated by (i) 900,

(ii) 1800 and (iii) 00.

14. State and prove Brewster’s law.

15. Explain an experiment with require diagram which show the transverse nature of light.

16. Derive and expression for the refraction by a convex refractive surface. Using it derive the Lens

Maker’s formula.

17. What is diffraction of light? Draw a graph showing the variation of intensity with angle in

a single slit diffraction experiment. Write one feature which distinguishes the observed

pattern from the single slit pattern from the double slit pattern. How would the diffraction

pattern of a single slit be affected when: (i) the width of the slit is decreased and (ii) The

monochromatic source of light is replaced by a source of white light?

0 Dislike

## Other Lessons for You

How To Avoid Sleep While Studying?
I will give you the top 7 methods to avoid sleep while you are studying: 1) Be Interested in what you are Studying! Yes to prevent sleep you must make sure that you are Interested in what you are reading! So...
A

Abraham P.

Accounting for partnership: Basic concept
QUESTIONS: Define Partnership Deed. Answer: A partnership deed is an agreement among the partners which contains ai! the terms of the Partnership. It generally contains the details about all the...

Directions Cosines and Directions Ratios (3D GEOMETRY)
Direction Cosines are the Cosines Of the Angles of the angles between and the line and the coordinate Axis. If we have a vector (a,b,c) in space then two a=x2-x1,b=y2-y1 and c =z2-z1 are called the direction...

### Looking for Class 12 Tuition ?

Learn from Best Tutors on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

### Looking for Class 12 Tuition Classes?

The best tutors for Class 12 Tuition Classes are on UrbanPro

• Select the best Tutor
• Book & Attend a Free Demo
• Pay and start Learning

### Take Class 12 Tuition with the Best Tutors

The best Tutors for Class 12 Tuition Classes are on UrbanPro