MCQ
A concave mirror cannot be used as:
- AA magnifying mirror
- BA torch reflector
- ✓A dentist's mirror
- DA real view mirror
A concave mirror cannot be used as a rear view mirror because it forms inverted images of distant objects.
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Assertion (A): Corrosion of iron is commonly known as rusting
Reason (R): Corrosion of iron occurs in presence of water and air.

|
S. No.
|
$\angle \text{ i}$
|
$\angle \text{ r}$
|
$\angle \text{ e}$
|
| $I$ |
$60^{0}$
|
$40^{0}$
|
$61^{0}$
|
| $II$ |
$50^{0}$
|
$36^{0}$
|
$51^{0}$
|
| $III$ |
$40^{0}$
|
$28^{0}$
|
$39^{0}$
|
| $IV$ |
$30^{0}$
|
$20^{0}$
|
$31^{0}$
|