282109
An Object is immersed in a fluid of refractive index ' $\mu$ '. In order that the object becomes invisible when observed from outside, it should.
1 behave as a perfect reflector
2 have refractive index equal to one
3 absorb all light falling on it
4 have refractive index same as surrounding fluid, that is ' $\mu$ '
Explanation:
D: When an object is immerged in a fluid, and in order that the object becomes invisible when observed from outside, it should have refractive index same as surrounding fluid.
MHT-CET 2020
Ray Optics
282110
For the same angle of incidence, the angle of refraction in four media $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are $25^{\circ}$, $30^{\circ}, 35^{\circ}$ and $40^{\circ}$ respectively. The speed of light is least in medium
1 $\mathrm{D}$
2 $\mathrm{C}$
3 $\mathrm{B}$
4 $\mathrm{A}$
Explanation:
D: The speed of light will be least in medium having smallest angle of refraction.
$\mu=\frac{\sin \mathrm{i}}{\sin \mathrm{r}}=\frac{\text { speed of light in air }}{\text { speed of light in medium }}$
So, speed of light in medium $\propto$ angle of refraction Hence, the speed of light is least in medium A because A has least angle of refraction.
MHT-CET 2020
Ray Optics
282111
A ray of light is incident normally on a plane mirror. The angle of reflection will be
1 $0^{\circ}$
2 $90^{\circ}$
3 will not be reflected
4 $60^{\circ}$
Explanation:
A: Given, When light is incident normally on a plane mirror. The incident ray bounces back in the same path.
Then, $\angle \mathrm{i}=\angle \mathrm{r}=0^{\circ}$
AP EAMCET (22.09.2020) Shift-II
Ray Optics
282112
If frequency (v) of light is $5 \times 10^{16} \mathrm{~Hz}$ and speed of light in air is $3 \times 10^8 \mathrm{~m} / \mathrm{s}$. Find the ratio of wavelength of light in a medium of refractive index of 2 to air
282109
An Object is immersed in a fluid of refractive index ' $\mu$ '. In order that the object becomes invisible when observed from outside, it should.
1 behave as a perfect reflector
2 have refractive index equal to one
3 absorb all light falling on it
4 have refractive index same as surrounding fluid, that is ' $\mu$ '
Explanation:
D: When an object is immerged in a fluid, and in order that the object becomes invisible when observed from outside, it should have refractive index same as surrounding fluid.
MHT-CET 2020
Ray Optics
282110
For the same angle of incidence, the angle of refraction in four media $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are $25^{\circ}$, $30^{\circ}, 35^{\circ}$ and $40^{\circ}$ respectively. The speed of light is least in medium
1 $\mathrm{D}$
2 $\mathrm{C}$
3 $\mathrm{B}$
4 $\mathrm{A}$
Explanation:
D: The speed of light will be least in medium having smallest angle of refraction.
$\mu=\frac{\sin \mathrm{i}}{\sin \mathrm{r}}=\frac{\text { speed of light in air }}{\text { speed of light in medium }}$
So, speed of light in medium $\propto$ angle of refraction Hence, the speed of light is least in medium A because A has least angle of refraction.
MHT-CET 2020
Ray Optics
282111
A ray of light is incident normally on a plane mirror. The angle of reflection will be
1 $0^{\circ}$
2 $90^{\circ}$
3 will not be reflected
4 $60^{\circ}$
Explanation:
A: Given, When light is incident normally on a plane mirror. The incident ray bounces back in the same path.
Then, $\angle \mathrm{i}=\angle \mathrm{r}=0^{\circ}$
AP EAMCET (22.09.2020) Shift-II
Ray Optics
282112
If frequency (v) of light is $5 \times 10^{16} \mathrm{~Hz}$ and speed of light in air is $3 \times 10^8 \mathrm{~m} / \mathrm{s}$. Find the ratio of wavelength of light in a medium of refractive index of 2 to air
282109
An Object is immersed in a fluid of refractive index ' $\mu$ '. In order that the object becomes invisible when observed from outside, it should.
1 behave as a perfect reflector
2 have refractive index equal to one
3 absorb all light falling on it
4 have refractive index same as surrounding fluid, that is ' $\mu$ '
Explanation:
D: When an object is immerged in a fluid, and in order that the object becomes invisible when observed from outside, it should have refractive index same as surrounding fluid.
MHT-CET 2020
Ray Optics
282110
For the same angle of incidence, the angle of refraction in four media $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are $25^{\circ}$, $30^{\circ}, 35^{\circ}$ and $40^{\circ}$ respectively. The speed of light is least in medium
1 $\mathrm{D}$
2 $\mathrm{C}$
3 $\mathrm{B}$
4 $\mathrm{A}$
Explanation:
D: The speed of light will be least in medium having smallest angle of refraction.
$\mu=\frac{\sin \mathrm{i}}{\sin \mathrm{r}}=\frac{\text { speed of light in air }}{\text { speed of light in medium }}$
So, speed of light in medium $\propto$ angle of refraction Hence, the speed of light is least in medium A because A has least angle of refraction.
MHT-CET 2020
Ray Optics
282111
A ray of light is incident normally on a plane mirror. The angle of reflection will be
1 $0^{\circ}$
2 $90^{\circ}$
3 will not be reflected
4 $60^{\circ}$
Explanation:
A: Given, When light is incident normally on a plane mirror. The incident ray bounces back in the same path.
Then, $\angle \mathrm{i}=\angle \mathrm{r}=0^{\circ}$
AP EAMCET (22.09.2020) Shift-II
Ray Optics
282112
If frequency (v) of light is $5 \times 10^{16} \mathrm{~Hz}$ and speed of light in air is $3 \times 10^8 \mathrm{~m} / \mathrm{s}$. Find the ratio of wavelength of light in a medium of refractive index of 2 to air
282109
An Object is immersed in a fluid of refractive index ' $\mu$ '. In order that the object becomes invisible when observed from outside, it should.
1 behave as a perfect reflector
2 have refractive index equal to one
3 absorb all light falling on it
4 have refractive index same as surrounding fluid, that is ' $\mu$ '
Explanation:
D: When an object is immerged in a fluid, and in order that the object becomes invisible when observed from outside, it should have refractive index same as surrounding fluid.
MHT-CET 2020
Ray Optics
282110
For the same angle of incidence, the angle of refraction in four media $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are $25^{\circ}$, $30^{\circ}, 35^{\circ}$ and $40^{\circ}$ respectively. The speed of light is least in medium
1 $\mathrm{D}$
2 $\mathrm{C}$
3 $\mathrm{B}$
4 $\mathrm{A}$
Explanation:
D: The speed of light will be least in medium having smallest angle of refraction.
$\mu=\frac{\sin \mathrm{i}}{\sin \mathrm{r}}=\frac{\text { speed of light in air }}{\text { speed of light in medium }}$
So, speed of light in medium $\propto$ angle of refraction Hence, the speed of light is least in medium A because A has least angle of refraction.
MHT-CET 2020
Ray Optics
282111
A ray of light is incident normally on a plane mirror. The angle of reflection will be
1 $0^{\circ}$
2 $90^{\circ}$
3 will not be reflected
4 $60^{\circ}$
Explanation:
A: Given, When light is incident normally on a plane mirror. The incident ray bounces back in the same path.
Then, $\angle \mathrm{i}=\angle \mathrm{r}=0^{\circ}$
AP EAMCET (22.09.2020) Shift-II
Ray Optics
282112
If frequency (v) of light is $5 \times 10^{16} \mathrm{~Hz}$ and speed of light in air is $3 \times 10^8 \mathrm{~m} / \mathrm{s}$. Find the ratio of wavelength of light in a medium of refractive index of 2 to air
