Sources of Light, Transparent, Translucent and Opaque Objects

 

Sources of Light, Transparent, Translucent and Opaque Objects

 

Fill in the blanks:

      1.    You are able to see things because of ______

      2.    All non-luminousnobhects are visible due to the _________ of light falling on them.

      3.    Based on the ability of of ________to pass through them, the obects are classified as transparent, translucent and opaque.

      4.    Muddy water is _________ while clear water is __________

 

Write any two eamples:

      1.    Natural sources of light___________  _____________

      2.    Artificial sources of light___________ _____________

      3.    Non-luminous objects ___________  _____________

      4.    Transparent objects ___________       _____________

      5.    Translucent objects ___________       _____________

      6.    Opaque objects ___________   _____________

 

Write True/False:

      1.    Moon reflects its ownlight and hence it is a luminous object.

      2.    Some plastics are opaque while others are translucent.

      3.    If you are able to see clearly through an object, it is an opaque object.

      4.    Lantern fish emits ligth.

 

Define:

Light

____________________________________________________________

____________________________________________________________

 

Luminous objects

____________________________________________________________

____________________________________________________________

Non-luminous objects

____________________________________________________________

____________________________________________________________

Transparent Objects

____________________________________________________________

____________________________________________________________

 

Translucent Objects

____________________________________________________________

____________________________________________________________

 

Opaque Objects

____________________________________________________________

____________________________________________________________

 

 

 

ICT, Topic-History of Computers, Worksheet-2

 

ICT Revision Ws-2

 

Q. Select the correct fullform of these computer languages: (5)

 

PROLOG – Programming Logic / Progressive Logic

SQL- Squential Query Language / Structured Query Language

QBASIC – Quick Beginner’s All Purpose Symbolic Instruction Code/ Quantum Basic Beginner’s All Purpose Symbolic Instruction Code

FORTRAN – Formula Translator / Formal Translator

COBOL – Curious Brilliant Ongoing Language/ Common Business Oriented Language

 

Match languages with generation of languages: (5)

Generation	Languages
First-generation	Assembly language
Second-generation	Power Builder, SQL, NOMD
Third-generation	PROLOG, Mercury
Fourth-generation	PASCAL, FORTRAN, BASIC, COBOL, C, C++
Fifth-generation	Machine language

 

Write the difference between Low Level Languages and High Level Languages. (10)

Low Level Languages	High Level Languages

 

ICT, History of Computers Worksheet-1

 

ICT Revision Ws-1

 

Match these computers with their applications (4)

Type of computer	Application
Supercomputer	Personal use(home) and small organizations
Mainframe computer	Genetic engineering and petroleum exploration
Mini computer	Credit card processing
Micro computer	Multimedia, 3D graphics and game

 

Write which computer is this? (14)

     (a) Very high processing speed; can solve difficult and complex calculations with in nano seconds.

     (b) Capable of supporting thousands of users simultaneously.

     (c)  Medium-sized, multi-user computer which can support more than a dozen of users.

     (d) Easy in operation and available in different size as used for day to day working.

     (e) This computer produces output in the form of graph.

     (f)   This computer converts data into digits, performs operation on these digits at extremely fast rates.

     (g) This computer is best suited in situations where the display is required in digital format, but the data is collected in analog fort.

 

Write the name of developer of these languages: (2)

(Bjarne Stroustrup, John G. Kemeny and Thomas E. Kurtz, Guido van Rossum, James Gossling)

Python ____________

C++       ____________

JAVA      ____________

BASIC    ____________