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In Young's double slit experiment, if the two slits are illuminated with separate sources, no interference pattern is observed because
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(a) There will be no constant phase difference between the two waves |
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(b) The wavelengths are not equal |
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(c) The amplitudes are not equal |
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(d) None of the above |
Penetrating power of X-rays can be increased by
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(a) Increasing the potential difference between anode and cathode |
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(b) Decreasing the potential difference between anode and cathode |
| (c) Increasing the cathode filament current |
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(d) Decreasing the cathode filament current |
A ray of light incidents on a plane mirror at an angle of 30°. The deviation produced in the ray is
| (a) 30° | (b) 60° | (c) 90° | (d) 120° |
Assertion : In meter bridge experiment, a high resistance is always connected in series with a galvanometer.
Reason : As resistance increases current through the circuit increases.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
When light travels from one medium into another it suffers: