CBSE Class 7 Science Light: Shadows and Reflections (Class 7 NCERT New) Quiz 7

1. The size of a shadow of an opaque object close to the screen and away from the source of light

A Increases B Decreases C Remains the same D First Decreases and then Increases

2. This takes place from smooth polished surface when a beam of light falls on it-

A Refraction B Absorption C Reflection D Radiation

3. Shadows are formed only when the:-

A Transparent body in the path of light B Translucent body is in the path of light C No object is in the path of light D Opaque object is in the path of light

4. Shadows are/can:-

A Always smaller than the opaque object B Always bigger than the opaque object C Remains the same size as of the opaque object D Can be smaller or bigger than the opaque object

5. An example for rectilinear propagation of light is:-

A Formation of clouds B Formation of rainbows C Formation of rain D Formation of day and night

6. Study the given diagram carefully and select the correct option.

A Object X has rough surface. B Object X is a source of light C Object X is made from the magnetic material D None of these

7. What is true about reflection from plane mirror?

A The image formed by plane mirror is erect and virtual B Size of the image formed by plane mirror is equal to the size of the object C The distance of the image behind the plane mirror is equal to the distance of the object from the mirror D All of the above

8. Read the statement given by two students X & Y. X says - We cannot see our image in the mirror in complete dark room because there is no light to reflect.Y says- We cannot see objects through T shaped pipe because light travels through straight line.Who is correct?

A X's statement is correct B Y's statement is correct C Both X's and Y's statement is correct D None of these two statement is correct

9. Look at the set up of an experiment carefully and understand it :-What kind of objects were AB&C, which are used to form the shadow as given in the picture

A A-opaque, B- translucent, C- Transparent B A- Transparent, B- Opaque, C- Translucent C A- Opaque, B- Translucent, C- Transparent D None

10. An experiment was done in a dark place. Sheet P,Q & R are arranged in a straight line. When the bulb was turned on, bright circular patch of light was is seen on Sheet R only.Which of the following correctly classifies Sheet P,Q & R according to their properties?[AL-Allows light to pass throughDAL- Does not allow light to pass through][AL & DAL terms have been used ]

A AL- Sheet P & Q ; DAL - Sheet R B AL - Sheet P and R ; DAL - Sheet Q C AL - Sheet Q ; DAL - Sheet P & R D AL - R ; DAL - Sheet P & Q