Conditions for a light ray to pass undeviated - class-X
conditions for a light ray to pass undeviated
Questions
Light starting from a medium of refractive
index $ \mu $ undergoes refraction into a medium of index $ \mu $. If I and r stand for angle of incidence are refraction respectively :
- $
\frac{\sin i}{\sin r}=\frac{\mu}{\mu^{\prime}}
$ - $
\frac{\sin i}{\sin r}=\frac{\mu^{\prime}}{\mu}
$ - $
\frac{\cos i}{\cos r}=\frac{\mu^{\prime}}{\mu}
$ - $
\frac{\sin i}{\sin r}=1 / \mu \mu^{\prime}
$
Which of the following statements is false?
- A plane mirror produce a magnification of +1
- Focal length of a plane mirror is infinite
- For man of height h, to see his own complete image , a mirror of height at least equal to h is required
- For a ray of light, incidenting normally on a plane mirror, the angle of reflection is $ 180^0 $
What is the angle of incidence if a ray of light is not deviated when it enters a block of glass?
- $30^{\circ}$
- $60^{\circ}$
- $90^{\circ}$
- $0^{\circ}$
When a ray of light strikes the glass slab at $90^{\circ}$, it is seen that it does not deviate from its path. In such a situation :
- angle of incidence is zero
- angle of refraction is zero
- both(a) and (b)
- none of these
A ray of light passes from a medium L to a medium K. No refraction of light occurs if the ray of light hits the boundary of these two media at the angle of incidence equal to ...............
- $30^{\circ}$
- $90^{\circ}$
- $0^{\circ}$
- $120^{\circ}$
If any two media are optically exactly the same then; when light passes from one medium to another then:
- No bending occurs
- Sometimes it can bend
- Compete bending occurs
- None
Light, which is travelling along a normal, is ............ refracted
- Partially
- Completely
- Not
- All
A vertical ray of light strikes the horizontal surface of water. What will be the angle of incidence?
- $90^{\circ}$
- $100^{\circ}$
- $180^{\circ}$
- $0^{\circ}$