Team 1
0
Team 2
0
Teams
Name
Score
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10
×
A convex lens is ______ lens.
converging
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Check
Okay!
Check
10
×
P= - 25 D , Which types of lens is used?
concave lens
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Check
Okay!
Check
×
baam
Lose 10 points!
Oops!
×
shark
Other team loses 10 points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
lifesaver
Give 5 points!
Oops!
10
×
A ______ lens diverge the rays of light.
concave
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Check
Okay!
Check
10
×
In concave lens , only the ______ image formed.
virtual
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Check
10
×
The magnification of a real image has ______ sign because it is inverted.
minus or negative
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Okay!
Check
10
×
The distance between F and P is
focal length
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Check
Okay!
Check
10
×
A ______ image cannot be formed on a screen.
virtual
Oops!
Check
Okay!
Check
×
banana
Go to last place!
Oops!
×
rocket
Go to first place!
Okay!
×
gift
Win 25 points!
Okay!
×
lifesaver
Give 25 points!
Oops!
10
×
The unit of power of a lens is _____.
dioptre (D)
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Check
10
×
When an object is between F and 2F , the image is formed in _______.
beyond 2F
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Okay!
Check
10
×
The distance between the centre of lens and object is _______.
object distance
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Check
Okay!
Check
×
seesaw
Swap points!
Oops!
×
star
Double points!
Okay!
×
gift
Win 25 points!
Okay!
×
lifesaver
Give 15 points!
Oops!
10
×
Lens-maker's equation is
1/f = (n-1) (1/R1 + 1/R2)
Oops!
Check
Okay!
Check
10
×
II; = + 2 OO; , magnification is ____. Is the image is erect or inverted?
+ 2 / erect
Oops!
Check
Okay!
Check
×
heart
Other team wins 20 points!
Oops!
×
magnet
Take 15 points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
thief
Give points!
5
10
15
20
25
×
Restart
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