Mirror Formula Based(General Knowledge > General Science ) Questions and answers for exam Preparation

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