A parallel beam of infrared radiation of wavelength of 1.01 × 10-6 m is incident normally on a screen with two slits 5 × 10-6 m apart and the resulting interference pattern is observed on a distant screen. What is the largest number of maxima that can be observed on the screen?

A parallel beam of infrared radiation of wavelength of 1.01 × 10<sup>-6</sup> m is incident normally on a screen with two slits 5 × 10<sup>-6</sup> m apart and the resulting interference pattern is observed on a distant screen. What is the largest number of maxima that can be observed on the screen?

In a Young’s double slit experiment, the distance between the two slits is 0.5 mm and the distance between the screen and the slits is 1 m. When a light of wavelength 500 nm is incident on the slits, what would be distance between the two second bright fringes?

A

1 mm

B

2 mm

C

3 mm

D

4 mm

Two parallel slits 1 millimetre apart are placed 1 metre away 6-om the screen. What is the fringe separation due to interference effect, when a beam of wavelength 500 nanometres is incident on them?

A

5.0 mm

B

0.5 mm

C

5.0 cm

D

0.05 mm

An Identity Card has the number ABCDEFG, not necessarily in that order, where each letter represents a distinct digit (1, 2, 4, 5, 7, 8, 9 only). The number is divisible by 9. After deleting the first digit from the right, the resulting number is divisible by 6. After deleting two digits from the right of original number, the resulting number is divisible by 5. After deleting three digits from the right of original number, the resulting number is divisible by 4. After deleting four digits from the right of original number, the resulting number is divisible by 3. After deleting five digits from the right of original number, the resulting number is divisible by 2. Which of the following is a possible value for the sum of the middle three digits of the number?

A

8

B

9

C

11

D

12

Two narrow and parallel slits 0.08 cm apart are illuminated by a light of frequency 6 X 1011 kHz. At what distance from the slits should the screen be placed to obtain fringe width of 0.6 mm?

A

0.98 m

B

1.06 m

C

1.28 m

D

1.74 m

Which one of the following four addresses is NOT EXACTLY the same as the one given below? SLZ AGENCY NL 101/3910 KOALA BARK DR NEW CANBERRA WA 1234 AUSTRALIA i. SLZ AGENCY NL 101/3910 KOALA BARK DR NEW CANBERRA WA 1234 AUSTRALIA ii. SLZ AGENCY NL 101/3910 KOALA BARK DR NEW CANBERRA WA 1234 AUSTRALIA iii. SLZ AGENCY NL 101/3910 KOALA BARK DR NEW CANBERRA WA 1234 AUSTRALIA iv. SLZ AGENCY NL 101/3910 KOALA BARK DR NEW CANBEERRA WA 1234 AUSTRALIA

A

iii

B

iv

C

ii

D

i

Consider the following statements with regards to the shear force diagram for the beam ABCD: 1. The beam ABCD is an overhanging beam having supports at A and D only. 2. The beam carries a point load of 20 kN at C. 3. The beam carries a concentrated load of 10 kN at the end B. 4. The beam is an overhanging beam having supports at C and D only. 5. The beam carries a uniformly distributed load of 70 kN over the left hand portion AC only. Which of the above statements are correct?

A

1, 2 and 3 only

B

1, 3 and 5 only

C

2, 3 and 4 only

D

2, 4 and 5 only

Consider the following statements regarding types of supports and beams: 1. When both supports of beams are roller supports, the beam is known as simply supported beam. 2. A beam with one end fixed and the other end free is known as fixed beam. 3. A beam with both ends fixed is known as cantilever beam. 4. A beam with one end fixed and the other simply supported is known as propped cantilever. Which of the above statements is/are correct ?

A

1 only

B

1 and 4 only

C

1, 3 and 4 only

D

2, 3 and 4 only

The total length of a runway is 1000 m. The elevation at distance 0,200 m, 400 m, 600 m, 800 m and 1000 m are 100.0 m, 99.2 m, 101.0 m, 101.8 m, 101.4 m and 101.0 m respectively. The effective gradient of runway will be.

A

0.10 %

B

0.26 %

C

0.43 %

D

0.65 %

A parallel beam of electrons of a given momentum pass through a screen S₁ containing a slit and then produces a diffraction pattern on a screen S₂ placed behind it. The width of the central maximum observed on the screen S₂ can be increased by

A

decreasing the distance between the screens S₁ and S₂

B

increasing the width of the slit in screen S₁

C

decreasing the momentum of the electrons

D

increasing the momentum of the electrons

If average of 20 observations x₁, x₂, . . . . . x₂₀ is y, then the average of x₁ - 101, x₂ - 101, x₃ - 101, . . . . . x₂₀ - 101 is :

A

y - 20

B

y - 101

C

20y

D

101y

A parallel beam of infrared radiation of wavelength of 1.01 × 10^-6 m is incident normally on a screen with two slits 5 × 10^-6 m apart and the resulting interference pattern is observed on a distant screen. What is the largest number of maxima that can be observed on the screen?

Related Questions