If an object is placed beyond 2F of a converging lens, what kind of image is formed?
Correct answer C. Real and inverted
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Everyday Science MCQs
Page 150 of Everyday Science multiple-choice questions with answers. Tap an option to check yourself.
Page 150 of 198
What is the sign of the power of a concave lens?
Correct answer C. Negative
What is the unit of the power of a lens?
Correct answer D. Dioptre
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What is the diameter of a lens called?
Correct answer D. Aperture
What is a lens called that brings a beam of parallel rays to a point?
Correct answer A. Converging (convex) lens
According to de Broglie’s interpretation, how does an electron move in its orbit?
Correct answer B. Standing wave motion
What does the Compton effect prove?
Correct answer B. Photon theory of light
Which law states that the energy radiated by a black body is directly proportional to the fourth power of its Kelvin temperature?
Correct answer D. Stefan's law
To confine an electron within a box of radius 10⁻¹⁴ m, what would its speed need to be?
Correct answer D. Greater than the speed of light
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What is the uncertainty in momentum and position due to?
Correct answer A. Property of matter and radiation
Which instrument produces a three-dimensional image?
Correct answer C. Scanning electron microscope
In an electron microscope, what role do electric and magnetic fields play?
Correct answer D. Converging source of electrons
Why are energetic particles used in an electron microscope?
Correct answer A. Wavelength is very short
What property of light does a diffraction grating reveal when placed in a beam?
Correct answer B. Wave property
In the Davisson-Germer experiment, what do the electrons diffracted from a crystal demonstrate?
Correct answer A. Wave property
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A photon of wavelength 900 nm behaves like a particle of what mass?
Correct answer D. 2.46 × 10⁻³⁶ kg
When a photon is reflected straight back by a mirror, what is the change in its momentum?
Correct answer D. Double
In photoelectric emission, what happens if the wavelength of the incident radiation is increased?
Correct answer B. The average kinetic energy of the photoelectrons decreases
In the photoelectric effect, monochromatic light falls on a metal surface. If the intensity is doubled but the wavelength stays the same, what happens to the kinetic energy of the emitted electrons?
Correct answer B. Remains same
A photon of light passes from a vacuum into a denser transparent medium. What happens to its energy?
Correct answer A. It remains the same