CBSE Class 10 - Physics - The Human Eye and Colourful World (Very Short Q and A)(#cbsenotes)

The Human Eye and Colourful World

Very Short Q and A


Question 1: Name the essential parts of a human eye.

Answer: Cornea, Iris, Pupil, eye lens, ciliary muscles and retina.


Question 2: What is cornea??

Answer: Spherical membrane covering the front of the eye


Question 3: Which liquid fill the space behind the cornea?

Answer: Aqueous humour


Question 4: Which liquid fills the space between lens and retina?

Answer: vitreous humour


Question 5: How is the eye lens held in its position?

Answer: By Ciliary muscles which hold the eye in position.

CBSE Class 10 - SA2 Hindi-A Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 10 - SA2 Hindi-A Sample Question Paper (2016-17)

CBSE Class 7 - Pre-SA2 Hindi Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 7 - Pre-SA2 Hindi Sample Question Paper (2016-17)

CBSE Class 8 - SA2 Social Science Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 8 - SA2 Social Science Sample Question Paper (2016-17)

CBSE Class 7 - SA2 Social Studies Sample Question Paper (2016-17) (#cbsenotes)

CBSE Class 7 - SA2 Social Studies Sample Question Paper (2016-17)

CBSE Class 11 - Physical Education Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 11 - Physical Education Sample Question Paper (2016-17)

CBSE Class 12 - Marking Scheme of Economics Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 12 - Marking Scheme of Economics Sample Question Paper (2016-17)

☛See Class 12 Economics Sample Question Paper (2016-17)

CBSE Class 7 - SA2 Computers Sample Question Paper Set-2 (2016-17) (#cbsepapers)

CBSE Class 7 - SA2 Computers Sample Question Paper (2016-17)

CBSE Class 7 - SA2 Computers Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 7 - SA2 Computers Sample Question Paper (2016-17)

CBSE Revision Test - Class 11 - Physics - Motion in Straight Line (#cbsenotes)

Motion in Straight Line

Chapter Revision Test

Q1. A railway train 400m long is going from New Delhi railway station to Kanpur. [1]
   Can we consider railway train as a point object?


Q2. Shipra went from her home to school 2.5km away. On finding her home closed she [1]
   returned to her home immediately. What is her net displacement? What is the total
   distance covered by her?


Q3. Can speed of an object be negative? Justify [1]

CBSE Class 12 - Economics Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 12 - Economics Sample Question Paper (2016-17)

☛See Marking Scheme Of Economics SQP (2016-17)

CBSE Class 7 - SA2 English Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 7 - SA2 English Sample Question Paper (2016-17)

CBSE Class 10 - Marking Scheme of SA2 Social Science Sample Question Paper (2016-17)

CBSE Class 10  - Marking Scheme of SA2 Social Science Sample Question Paper (2016-17)

See Class 10 SA2 Social Science SQP (2016-17)

CBSE Class 10 - SA2 Social Science Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 10  - SA2 Social Science Sample Question Paper (2016-17)

See Marking Scheme of SA2 Social Science SQP (2016-17)

CBSE Class 8 - Sanskrit (संस्कृत) SA2 Sample Question Paper (2016-17)(#cbsepapers)

CBSE Class 8 - Sanskrit (संस्कृत) SA2 Sample Question Paper (2016-17)

CBSE Class 8 - Maths - Squares - Properties of A Perfect Square (#cbsenotes)

Properties of A Perfect Square

Please look at the table of some squares given below. You will see interesting patterns here.

Square of number 0 = 0

Number	Square	Number	Square	Number	Square
1	1	11	121	21	441
2	4	12	144	22	484
3	9	13	169	23	529
4	16	14	196	24	576
5	25	15	225	25	625
6	36	16	256	26	676
7	49	17	289	27	729
8	64	18	324	28	784
9	81	19	361	29	841
10	100	20	400	30	900

PROPERTY 1:
Look at the table above. Observe that none of the column of squares ends with 2, 3, 7, or 8. Therefore we can say that a number endings with 2, 3, 7, 8 can never be a perfect square.
Thus 228257 , 132457 , 189678 , 84453 are not perfect squares.

PROPERTY 2:
Look at the last row of the table shown above. We notice that all the perfect squares are ending with an even number or 0. In the first line  e.g. 10² = 100 , 20² = 400, 30² =900,
Similarly 80²  = 6400, 50² = 2500.

We can prime factorise and see that 10, 20, 30,  etc . are not perfect squares. Thus a number ending with odd  number of zeros can never be a perfect square.

CBSE Class 8 - English SA2 Sample Question Paper (2016-17)

CBSE Class 8 - English SA2 Sample Question Paper (2016-17)

CBSE Class 12 - Biology Marking Scheme Of Sample Question Paper (2016-17) (#cbsenotes)

CBSE Class 12 - Biology Marking Scheme Of Sample Question Paper (2016-17)

☛See Biology Sample Question Paper (2016-17)

CBSE Class 8 - Hindi SA2 Sample Question Paper (2016-17) (#cbsenotes)

CBSE Class 8 - Hindi SA2 Sample Question Paper (2016-17)

CBSE Class 12 - Biology Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 12 - Biology Sample Question Paper (2016-17)

☛See Biology Marking Scheme Of Sample Question Paper (2016-17)