### Kumar Male, 40 Years

Associated for 11 Years 11 Months

#### Activity Score - 32

Location: Delhi, India
• Total Experience:
1 Year
Tutoring Experience :

14 YEARS OF TEACHING PHYSICS,.EX FIIT JEE TEACHER(TEACHING ONLY PHYSICS FOR CLASS 11,12,IIT JEE,IP,IB,SAT 2)still teaching in more than 5 institution those who are preparing for IIT,PMT,DCE,AIEEE,excellent command over subject,Create a base of 11th,12th student for CBSE EXAM WITH COMPETITIVE EXAM PREPARATION.

Tutoring Option :
Home Tuition Only
Tutoring Approach :

Teaches:
 Class 11 - 12 Mathematics Physics All Boards English/Hindi Medium INR 1500 / Hour Engineering Entrance & IITJEE IIT JEE Mains INR 2000 / Hour Medical Entrance & AIPMT Medical Entrance Exams INR 2000 / Hour
• ## Question: Name the source from which the earth receives ultraviolet radiation.

Posted in: Physics | Date: 22/07/2016

sun

• ## Question: What is the refractive nature of an air bubble in water?

Posted in: Physics | Date: 22/07/2016

concave because light ray goes from water to air ..

• ## Question: Why does the sky appear blue in colour?

Posted in: Physics | Date: 22/07/2016

Due to scattering of light as per Rayleigh criterion

• ## Question: What is the use of spectrometer?

Posted in: Physics | Date: 22/07/2016

Used for measuring the refractive index of the prism.

• ## Question: When is the refracted Ray within a prism parallel to its Base?

Posted in: Physics | Date: 22/07/2016

when i1=i2 and r1=r2

• ## Question: When two lens are in contact, what is the formula for effective focal length?

Posted in: Physics | Date: 22/07/2016

1/F=1/F1+1/F2 WHERE FI AND FI IS THE FOCAL LENGTH OF INDIVISUAL LENS AND F IS THE NET FOCAL LENGTH

• ## Question: What happens when a lens of refractive index a is placed in a medium having grea...

Posted in: Physics | Date: 22/07/2016

we know that 1/f=(u2/u1-1)(1/r1-1/r2) if u1>u2 then f becomes negative for convex lens and  f becomes positive for concave lens ...therefore convex lens will behave like diveging lens and concave lens will act as a converging lens.

• ## Question: Focal length of mirror or lens changes when immersed In another medium?

Posted in: Physics | Date: 22/07/2016

for lens the formulae depends on refractive index but for mirror f=r/2 does not depend on refractive index hence focal length of lens changes but mirror does not.

• ## Question: Give the lens makers formula.

Posted in: Physics | Date: 22/07/2016

i/f=(1u2-1)(1/r1-1/r2)