Q. No.A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5 x 10-5 cm. The distance of the first dark band of the diffraction pattern from the center of the screen is:
1. 0.10 cm
2. 0.25 cm
3. 0.20 cm
4. 0.15 cm
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
In Young's double-slit experiment, the separation d between the slits is 2 mm, the wavelength of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same and D) the separation between the slits needs to be changed to:
1. 1.8 mm
2. 1.9 mm
3. 2.1 mm
4. 1.7 mm
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of:
| 1. | Small focal length and large diameter |
| 2. | Large focal length and small diameter |
| 3. | Large focal length and large diameter |
| 4. | Small focal length and small diameter |
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
The intensity at the maximum in a Young's double-slit experiment is I0. Distance between two slits is d = 5, where is the wavelength of light used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10d?
1.
2.
3.
4.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
Two slits in young’s experiment have widths in the ratio 1:25. The ratio of intensity at the maxima and minima in the interference pattern is
1.
2.
3.
4.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
At the first minimum adjacent to the central maximum of a single slit diffraction pattern, the phase difference between the Huygen’s wavelet from the edge of the slit and the wavelet from the midpoint of the slit is:
1. \(\frac{\pi}{4}~radian\)
2. \(\frac{\pi}{2}~radian\)
3. \(\pi~radian\)
4. \(\frac{\pi}{8}~radian\)
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
In a double-slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. Monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double-slit within the central maxima of a single-slit pattern?
1. 0.2 mm
2. 0.1 mm
3. 0.5 mm
4. 0.02 mm
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
A beam of light of λ = 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is :
1. 1.2 cm
2. 1.2 mm
3. 2.4 cm
4. 2.4 mm
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
In Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is λ is K, (λ being the wavelength of light used). The intensity at a point where the path difference is λ/4 will be:
1. K
2. K/4
3. K/2
4. Zero
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.