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Ray Optics

282892 If numerical aperture of a microscope is increased then its

1 resolving power remains constant

2 resolving power becomes zero

3 limit of resolution is decreased

4 limit of resolution is increased

MHT-CET 2018

Ray Optics

282893 On decreasing the wavelength of incident light from $8000 A$ to $4000 A$ . The intensity of the scattered light in Rayleigh scattering will become times the initial scattered intensity.

1 2

2 4

3 16

4 8

Explanation:

C: Given, $λ_{1} = 8000 \AA$ and $λ_{2} = 4000 \AA$
Rayleigh scattering intensity (I) $\propto \frac{1}{λ^{4}}$
$\begin{array}{r} \frac{I_{2}}{I_{1}} = {(\frac{λ_{1}}{λ_{2}})}^{4} \\ I_{2} = {(\frac{8000 \AA}{4000 \AA})}^{4} \times I_{1} \\ I_{2} = 16 I_{1} \end{array}$

GUJCET 2018

Ray Optics

282894 Assertion: Sky is maximum red in morning.
Reason: Smallest wavelength scatter maximum.

1 If both Assertion and Reason are correct and reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

3 If Assertion is correct but Reason is incorrect

4 If both the Assertion and Reason are incorrect

AIIMS-26.05.2018(M)

Ray Optics

282895 The magnifying power of a simple microscope is (when final image is formed at $D = 25 cm$ from eye)

1

\frac{D}{f}

2

1 + \frac{D}{f}

3

1 + \frac{f}{D}

4

1 - \frac{D}{f}

#[examname: CG PET -2018]#

Explanation:

B: Magnifying power $(m) = 1 + \frac{D}{f}$ .

CG PET -2018

Ray Optics

282892 If numerical aperture of a microscope is increased then its

1 resolving power remains constant

2 resolving power becomes zero

3 limit of resolution is decreased

4 limit of resolution is increased

MHT-CET 2018

Ray Optics

282893 On decreasing the wavelength of incident light from $8000 A$ to $4000 A$ . The intensity of the scattered light in Rayleigh scattering will become times the initial scattered intensity.

1 2

2 4

3 16

4 8

Explanation:

C: Given, $λ_{1} = 8000 \AA$ and $λ_{2} = 4000 \AA$
Rayleigh scattering intensity (I) $\propto \frac{1}{λ^{4}}$
$\begin{array}{r} \frac{I_{2}}{I_{1}} = {(\frac{λ_{1}}{λ_{2}})}^{4} \\ I_{2} = {(\frac{8000 \AA}{4000 \AA})}^{4} \times I_{1} \\ I_{2} = 16 I_{1} \end{array}$

GUJCET 2018

Ray Optics

282894 Assertion: Sky is maximum red in morning.
Reason: Smallest wavelength scatter maximum.

1 If both Assertion and Reason are correct and reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

3 If Assertion is correct but Reason is incorrect

4 If both the Assertion and Reason are incorrect

AIIMS-26.05.2018(M)

Ray Optics

282895 The magnifying power of a simple microscope is (when final image is formed at $D = 25 cm$ from eye)

1

\frac{D}{f}

2

1 + \frac{D}{f}

3

1 + \frac{f}{D}

4

1 - \frac{D}{f}

#[examname: CG PET -2018]#

Explanation:

B: Magnifying power $(m) = 1 + \frac{D}{f}$ .

CG PET -2018

Ray Optics

282892 If numerical aperture of a microscope is increased then its

1 resolving power remains constant

2 resolving power becomes zero

3 limit of resolution is decreased

4 limit of resolution is increased

MHT-CET 2018

Ray Optics

282893 On decreasing the wavelength of incident light from $8000 A$ to $4000 A$ . The intensity of the scattered light in Rayleigh scattering will become times the initial scattered intensity.

1 2

2 4

3 16

4 8

Explanation:

C: Given, $λ_{1} = 8000 \AA$ and $λ_{2} = 4000 \AA$
Rayleigh scattering intensity (I) $\propto \frac{1}{λ^{4}}$
$\begin{array}{r} \frac{I_{2}}{I_{1}} = {(\frac{λ_{1}}{λ_{2}})}^{4} \\ I_{2} = {(\frac{8000 \AA}{4000 \AA})}^{4} \times I_{1} \\ I_{2} = 16 I_{1} \end{array}$

GUJCET 2018

Ray Optics

282894 Assertion: Sky is maximum red in morning.
Reason: Smallest wavelength scatter maximum.

1 If both Assertion and Reason are correct and reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

3 If Assertion is correct but Reason is incorrect

4 If both the Assertion and Reason are incorrect

AIIMS-26.05.2018(M)

Ray Optics

282895 The magnifying power of a simple microscope is (when final image is formed at $D = 25 cm$ from eye)

1

\frac{D}{f}

2

1 + \frac{D}{f}

3

1 + \frac{f}{D}

4

1 - \frac{D}{f}

#[examname: CG PET -2018]#

Explanation:

B: Magnifying power $(m) = 1 + \frac{D}{f}$ .

CG PET -2018

Ray Optics

282892 If numerical aperture of a microscope is increased then its

1 resolving power remains constant

2 resolving power becomes zero

3 limit of resolution is decreased

4 limit of resolution is increased

MHT-CET 2018

Ray Optics

282893 On decreasing the wavelength of incident light from $8000 A$ to $4000 A$ . The intensity of the scattered light in Rayleigh scattering will become times the initial scattered intensity.

1 2

2 4

3 16

4 8

Explanation:

C: Given, $λ_{1} = 8000 \AA$ and $λ_{2} = 4000 \AA$
Rayleigh scattering intensity (I) $\propto \frac{1}{λ^{4}}$
$\begin{array}{r} \frac{I_{2}}{I_{1}} = {(\frac{λ_{1}}{λ_{2}})}^{4} \\ I_{2} = {(\frac{8000 \AA}{4000 \AA})}^{4} \times I_{1} \\ I_{2} = 16 I_{1} \end{array}$

GUJCET 2018

Ray Optics

282894 Assertion: Sky is maximum red in morning.
Reason: Smallest wavelength scatter maximum.

1 If both Assertion and Reason are correct and reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

3 If Assertion is correct but Reason is incorrect

4 If both the Assertion and Reason are incorrect

AIIMS-26.05.2018(M)

Ray Optics

282895 The magnifying power of a simple microscope is (when final image is formed at $D = 25 cm$ from eye)

1

\frac{D}{f}

2

1 + \frac{D}{f}

3

1 + \frac{f}{D}

4

1 - \frac{D}{f}

#[examname: CG PET -2018]#

Explanation:

B: Magnifying power $(m) = 1 + \frac{D}{f}$ .

CG PET -2018

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