Light travels in straight lines. In which of the following is this principle manifested?
I. Pinhole camera II Formation of shadows III. Diffraction of light IV. Occurrence of eclipse A. I and III only B. II and III only C. I, II and III only D. I, II and IV only E. I, II, III and IV Correct Answer: Option E – I, II, III and...
A ray of light is incident on a body x as shown in the diagram below. What is the refractive index of the body?
A. 1.63 B. 1.50 C. 1.49 D. 1.33 E. 1.02 Correct Answer: Option A – 1.63
A ray of light is incident on mirror m1 and after reflection is incident on mirror m2 as shown in the diagram, calculate the angle of reflection of the ray at mirror m2
A. 120° B. 90° C. 60° D. 45° E. 30° Correct Answer: Option E – 30°
How much heat is required to convert 20 g of ice at 0°C to water at the same temperature? (Specific latent heat of ice = 336 J g-1)
A. 1.35 x 10³J B. 5.38 x 10³J C. 6.72 x 10³J D. 7.06 x 10³J E. 8.06 x 10³J Correct Answer: Option C – 6.72 x 10³JProducts
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