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Mirror Formula Based(General Knowledge > General Science ) Questions and Answers
Home
Topic
General Knowledge
General Science
Mirror Formula Based
Question 1.
A ray of light is travelling from a rarer medium to a denser medium
goes straight into the second medium
bends towards the normal
bends away from the normal
does not enter at all
Explanation:-
Answer: Option B. ->
bends towards the normal
Question 2.
A point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm
at infinity
at focus
at pole
behind the mirror.
Explanation:-
Answer: Option D. ->
behind the mirror.
Question 3.
What does translucent mean?
Light can pass through it
No light can pass through it
some light can pass through it
none of the above
Explanation:-
Answer: Option C. ->
some light can pass through it
Question 4.
A dentist uses a small dental mirror to help magnify teeth in your mouth
a convex mirror
a concave mirror
a convex lens
a concave lens
Explanation:-
Answer: Option B. ->
a concave mirror
Question 5.
A concave mirror of focal length 20 cm forms an image having twice the size of object
25 cm
40 cm
10 cm
At infinity
Explanation:-
Answer: Option C. ->
10 cm
Question 6.
What colour is best to be seen in the dark?
yellow
black
grey
bright green
Explanation:-
Answer: Option A. ->
yellow
Question 7.
What is reflective in our classroom?
lights
a book bag
computer
Mrs Gaunt
Explanation:-
Answer: Option B. ->
a book bag
Question 8.
What does opaque mean?
Light can pass through it
No light can pass through it
some light can pass through it
All of above
Explanation:-
Answer: Option B. ->
No light can pass through it
Question 9.
What is the ray of light that strikes the surface ?
normal ray
reflected ray
Incident ray
normal
Explanation:-
Answer: Option C. ->
Incident ray
Question 10.
Where does light come from?
sun
light bulb
curtains
windows
Explanation:-
Answer: Option A. ->
sun
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