282888
In a compound microscope, the intermediate image is
1 virtual, inverted and diminished
2 virtual, inverted and magnified
3 real, inverted and diminished
4 real, inverted and magnified
Explanation:
D: In a compound microscope, the intermediate image is formed by objective lens, and it is real inverted and magnified.
CG PET- 2019
Ray Optics
282889
Which one of the following is the natural phenomenon based on which a simple periscope works?
1 Reflection of light
2 Refraction of light
3 Dispersion of light
4 Total internal reflection of light
Explanation:
A: Periscope- It consist of an iron outer case with mirrors at each end set parallel to each other at a \(45^{\circ}\) angle.
It works on the principle of reflection of light.
NDA (I) 2018
Ray Optics
282890
Assume that light of wavelength \(6000 \AA\) is coming from a star. What is the time resolution of a telescope whose objective has a diameter of 100 inch?
282891
An object is placed at a distance \(u\) from a simple microscope of focal length \(f\). The angular magnification depends on
1 on fbut not on \(u\)
2 on \(u\) but not on \(f\)
3 on f as well as \(u\)
4 neither on f nor on \(u\)
Explanation:
A: Angular magnification \((\mathrm{m})=\frac{\mathrm{D}}{\mathrm{u}}, \mathrm{D}\) is least distance of distinct vision.
Using lens formula-
\(\begin{aligned}
\frac{1}{\mathrm{v}}-\frac{1}{\mathrm{u}}=\frac{1}{\mathrm{f}} \\
\frac{1}{-\mathrm{D}}-\frac{1}{-\mathrm{u}}=\frac{1}{\mathrm{f}}
\end{aligned}\)
Hence, \(m=\frac{D}{u}=1+\frac{D}{f}\)
\(\mathrm{m}=1+\frac{\mathrm{D}}{\mathrm{f}}\)
Angular magnification depends on only ' \(\mathrm{f}\) ' not on 'u'.
282888
In a compound microscope, the intermediate image is
1 virtual, inverted and diminished
2 virtual, inverted and magnified
3 real, inverted and diminished
4 real, inverted and magnified
Explanation:
D: In a compound microscope, the intermediate image is formed by objective lens, and it is real inverted and magnified.
CG PET- 2019
Ray Optics
282889
Which one of the following is the natural phenomenon based on which a simple periscope works?
1 Reflection of light
2 Refraction of light
3 Dispersion of light
4 Total internal reflection of light
Explanation:
A: Periscope- It consist of an iron outer case with mirrors at each end set parallel to each other at a \(45^{\circ}\) angle.
It works on the principle of reflection of light.
NDA (I) 2018
Ray Optics
282890
Assume that light of wavelength \(6000 \AA\) is coming from a star. What is the time resolution of a telescope whose objective has a diameter of 100 inch?
282891
An object is placed at a distance \(u\) from a simple microscope of focal length \(f\). The angular magnification depends on
1 on fbut not on \(u\)
2 on \(u\) but not on \(f\)
3 on f as well as \(u\)
4 neither on f nor on \(u\)
Explanation:
A: Angular magnification \((\mathrm{m})=\frac{\mathrm{D}}{\mathrm{u}}, \mathrm{D}\) is least distance of distinct vision.
Using lens formula-
\(\begin{aligned}
\frac{1}{\mathrm{v}}-\frac{1}{\mathrm{u}}=\frac{1}{\mathrm{f}} \\
\frac{1}{-\mathrm{D}}-\frac{1}{-\mathrm{u}}=\frac{1}{\mathrm{f}}
\end{aligned}\)
Hence, \(m=\frac{D}{u}=1+\frac{D}{f}\)
\(\mathrm{m}=1+\frac{\mathrm{D}}{\mathrm{f}}\)
Angular magnification depends on only ' \(\mathrm{f}\) ' not on 'u'.
282888
In a compound microscope, the intermediate image is
1 virtual, inverted and diminished
2 virtual, inverted and magnified
3 real, inverted and diminished
4 real, inverted and magnified
Explanation:
D: In a compound microscope, the intermediate image is formed by objective lens, and it is real inverted and magnified.
CG PET- 2019
Ray Optics
282889
Which one of the following is the natural phenomenon based on which a simple periscope works?
1 Reflection of light
2 Refraction of light
3 Dispersion of light
4 Total internal reflection of light
Explanation:
A: Periscope- It consist of an iron outer case with mirrors at each end set parallel to each other at a \(45^{\circ}\) angle.
It works on the principle of reflection of light.
NDA (I) 2018
Ray Optics
282890
Assume that light of wavelength \(6000 \AA\) is coming from a star. What is the time resolution of a telescope whose objective has a diameter of 100 inch?
282891
An object is placed at a distance \(u\) from a simple microscope of focal length \(f\). The angular magnification depends on
1 on fbut not on \(u\)
2 on \(u\) but not on \(f\)
3 on f as well as \(u\)
4 neither on f nor on \(u\)
Explanation:
A: Angular magnification \((\mathrm{m})=\frac{\mathrm{D}}{\mathrm{u}}, \mathrm{D}\) is least distance of distinct vision.
Using lens formula-
\(\begin{aligned}
\frac{1}{\mathrm{v}}-\frac{1}{\mathrm{u}}=\frac{1}{\mathrm{f}} \\
\frac{1}{-\mathrm{D}}-\frac{1}{-\mathrm{u}}=\frac{1}{\mathrm{f}}
\end{aligned}\)
Hence, \(m=\frac{D}{u}=1+\frac{D}{f}\)
\(\mathrm{m}=1+\frac{\mathrm{D}}{\mathrm{f}}\)
Angular magnification depends on only ' \(\mathrm{f}\) ' not on 'u'.
282888
In a compound microscope, the intermediate image is
1 virtual, inverted and diminished
2 virtual, inverted and magnified
3 real, inverted and diminished
4 real, inverted and magnified
Explanation:
D: In a compound microscope, the intermediate image is formed by objective lens, and it is real inverted and magnified.
CG PET- 2019
Ray Optics
282889
Which one of the following is the natural phenomenon based on which a simple periscope works?
1 Reflection of light
2 Refraction of light
3 Dispersion of light
4 Total internal reflection of light
Explanation:
A: Periscope- It consist of an iron outer case with mirrors at each end set parallel to each other at a \(45^{\circ}\) angle.
It works on the principle of reflection of light.
NDA (I) 2018
Ray Optics
282890
Assume that light of wavelength \(6000 \AA\) is coming from a star. What is the time resolution of a telescope whose objective has a diameter of 100 inch?
282891
An object is placed at a distance \(u\) from a simple microscope of focal length \(f\). The angular magnification depends on
1 on fbut not on \(u\)
2 on \(u\) but not on \(f\)
3 on f as well as \(u\)
4 neither on f nor on \(u\)
Explanation:
A: Angular magnification \((\mathrm{m})=\frac{\mathrm{D}}{\mathrm{u}}, \mathrm{D}\) is least distance of distinct vision.
Using lens formula-
\(\begin{aligned}
\frac{1}{\mathrm{v}}-\frac{1}{\mathrm{u}}=\frac{1}{\mathrm{f}} \\
\frac{1}{-\mathrm{D}}-\frac{1}{-\mathrm{u}}=\frac{1}{\mathrm{f}}
\end{aligned}\)
Hence, \(m=\frac{D}{u}=1+\frac{D}{f}\)
\(\mathrm{m}=1+\frac{\mathrm{D}}{\mathrm{f}}\)
Angular magnification depends on only ' \(\mathrm{f}\) ' not on 'u'.
