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Which of the following has the highest energy?
Collection of verified questions for Prakash under General Science. Includes previous year exam questions with official answer keys and step-by-step solutions.
Which of the following has the highest energy?
When a ray of light travels from a denser medium to a rarer medium, then -
An endoscope is -
Which of the following statements is not correct?
The gas used in discharge tubes for optical decoration and advertising is -
Consider the following statements - 1. Long wavelength light is scattered much more than short wavelength light. 2. The speed of visible light in water is 0.95 times that in vacuum. 3. Radio waves are produced by rapidly oscillating electrical currents. 4. To detect overspeeding vehicles, police use the Doppler effect of reflected short radio waves. Which of these statements are correct?
The 'endoscope' used by physicians to examine the internal organs of patients operates on which of the following principles?
The image formed on the retina of human eye is -
Propagation of light energy in an optical fibre is accomplished through the application of which phenomenon?
The technique of recording and reproducing three-dimensional images of an object is called -
Which of the following is used to produce three-dimensional pictures?
Consider the following statements - 1. If two circles of magenta and yellow overlap, the intersecting area will be red. 2. If two circles of cyan and magenta overlap, the intersecting area will be blue. Which of the statements given above is/are correct?
The reason for mirage is -
Among the following colours present in white light, which colour is least deviated by a glass prism?
Assertion (A): In a motion picture, usually 24 frames per second are projected from one end of the film to the other. Reason (R): The image formed on the retina of the eye persists for 0.1 s after the stimulus is removed. Code:
For reproducing sound, a CD (Compact Disc) audio player uses a -
What is the primary advantage of having two eyes instead of one?
Looking directly at the Sun during a total solar eclipse causes irreversible eye damage. Burning of the retina is caused by which of the following components of solar rays?
Diffusion of light in the atmosphere takes place due to -
The colour of light is determined by its -
Consider the following natural phenomena - 1. Terrestrial heating 2. Reflection of light 3. Refraction of light 4. Diffraction of light Due to which of these phenomena does a mirage form?
The formation of a mirage is an example of -
What type of image is formed on the retina by the eye lens?
Consider the following statements - 1. Optical fibre is based on the principle of total internal reflection. 2. Energy consumption in optical fibre communication systems is extremely low. 3. Optical fibre communication is immune to radio-frequency interference. 4. Reliance Industries is engaged in the manufacturing of optical fibres in India. Which of these statements are correct?
The reason why the Sun is visible to us a few minutes before the actual sunrise is -