Grade 6 Revision- Light, Shadow and Reflection

When a person sees himself in a mirror, what do his eyes observe?

• A) A virtual image whose rays originate at the person.
• B) A virtual image formed from light that originate behind the mirror.
• C) Areal image whose rays appear to originate at the person.
• D) A real image whose rays originate behind the mirror.

What happen to light rays when they strike an uneven surface from same direction?

• A) They are reflected in the same direction
• B) They are reflected in many directions
• C) They are absorbed by the surface
• D) They pass through the surface and are diffracted

An image is formed on a screen when

• A) a transparent object is placed between the screen and the source of light
• B) an opaque object is placed between the screen and the source of light
• C) Both the above are correct
• D) None of the above is correct

In a pinhole camera, the image formed is

• A) erect
• B) inverted
• C) smaller
• D) larger

Read the passage given below and answer the questions that follow. Passage: Take a comb in your right hand and bring it to your hair and look at yourself in mirror. You can see your own face in the mirror. This is your mirror image. In your mirror image you appear to be holding the comb in your

• A) left hand
• B) right hand
• C) comb is not visible
• D) None of these is correct

Passage-2: Take a comb in your right hand and bring it to your hair and look at yourself in mirror. You can see your own face in the mirror. This is your mirror image. The images of an object formed in a pin hole camera and that in a mirror are

• A) quite similar
• B) inverted or upside down
• C) can't say
• D) All are incorrect

The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Solar and lunar eclipses are results of shadow formation. Reason: Sun is essential for shadow formation.

• A) Both A and R are true and R is the correct explanation of A.
• B) Both A and R are true but R is not the correct explanation of A.
• C) A is true but R is false.
• D) A is false but R is true.

The image formed by pinhole camera on the screen in the figure is

• A) erect and enlarged
• B) inverted and enlarged
• C) erect and diminished
• D) inverted and diminished

What is the correct alignment during a solar eclipse?

• A) Sun, Moon, Earth
• B) Moon, Sun, Earth
• C) Sun, Earth, Moon
• D) None of these

Periscope, a device used in U-boats, makes use of

• A) reflection of light
• B) refraction of light
• C) shadow formation by opaque objects
• D) None of these