Q. Bolometers are used for ionizing particles, photons and non-ionizing particles.

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Q. What is solar time?

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Q. What is the fundamental unit of solar time?

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Q. What are the two types of solar time?

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Q. What is apparent time also known as?

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Q. Which of the following is the simplest sundial?

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Q. What is mean solar time also known as?

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Q. Solar time is _____ clock time in December and ____ clock time in September.

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Q. Why is does the solar time vary in September and December?

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Q. The clock running at a constant (say, a pendulum clock) rate _____

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Q. What does a clock running at a constant rate follow?

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Q. What is apparent solar day?

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Q. Which of the following describes the elliptical nature of earth’s orbit?

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Q. The hour angle of the mean sun plus 12 hours is _______

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Q. Solar time is 21 seconds less than clock time in September and 29 seconds more than clock time in December.

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Q. The inclination of earth’s axis also contributes towards variation in solar time.

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Q. What is angle subtended by sun on earth in degrees?

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Q. Why is angle subtended by sun on earth’s surface so small?

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Q. When revolving around the sun, the earth moves in an elliptical cycle _______

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Q. Which month is the earth closes to the sun?

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