Category Archives: Class 10

Class 10 articles

Important Questions(1 marks/2 Marks) for Science Class 10 Board

Here is the important question of 1 and 2 Marks for Science Class 10 Board Question 1) Write name of the compound: CH3-CH2-CHO. Question 2)  Trilobite, Ammonite are which type of fossils? Question 3)  Define biological magnification. Question 4) A person suffering from an eye-defect uses lenses of power 1D to correct the defect. Name the defect, he is suffering from and the nature of lens to … Continue reading Important Questions(1 marks/2 Marks) for Science Class 10 Board »

Download Class 10 Physics formulas and summary pdf

This article is about CBSE Class 10 Physics formulas and summary pdf(Free) . Having all the formula in one place is always helpful for the students, Keeping that in mind,We have prepared a physics formula pdf for CBSE Class 10 students.  This physics formula  and summary pdf contains the physics formula and summary that are aimed for class 10 students as per the NCERT physics … Continue reading Download Class 10 Physics formulas and summary pdf »

Use of units in physics

Introduction about physics and studying the subject This article is mainly about use of units in physics. But before going further let us first discuss about how to avoid problems that students face while studying physics. When you study physics you must have appropriate skills or you would have to struggle a lot while studying the subject. In my experience students fail to learn physics … Continue reading Use of units in physics »

Class 10 CBSE Reflection and refraction extra questions

Q1. What is the difference between reflection and refraction?
Q2.Refraction is caused by
a. different wave speeds.
b. more than one reflection.
c. displaced images.
d. bending.

Q3. What will happen to ray of light when it travels from rarer medium to a denser medium ?

Q4. What is absolute refractive index ?
Q5. If refractive index of glass is 1.65, What is the speed of light in glass. ?

CBSE Board and CCE FAQ -I

Question: Is it compulsory to appear in theory and practical papers in the compartment examination
Asnwer: In case the candidate has passed in the practical in the main examination, he/she is allowed to appear in the theory part only, and marks in the practical exam obtained at the main examination are carried forward and accounted for. In case a candidate has failed in the practical exam he/she shall have to appear in the theory and practical examination both irrespective of the fact that he/she has already cleared the theory examination

Mirror and Lens Problems

Glossary of Mirror and Lenses

Plane Mirror
A plane mirror is a mirror with a planar reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence.It always form virtual image

Concave or Converging Mirrors
A curved mirror that has its center farther away from you than its edges is called a concave mirror. A concave mirror tends to reflect parallel rays through a point called its focus – in other words a concave mirror converges light. Therefore concave mirrors are often referred to as converging mirrors. This converging effect makes sense if you imagine a concave mirror to be an array of small plane mirrors.You can demonstrate the converging of parallel light rays by a concave mirror quite dramatically for yourself. A relatively small concave mirror placed in the sun will gather enough light to ignite a small piece of paper quite quickly

Convex or Diverging Mirrors