B: magnifying glass
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The ray diagram shows two rays from a point on an object placed in front of a diverging (concave) lens. What are the …
Light is incident on a mirror and is reflected as shown. What is the angle of incidence and the angle of reflection?
Light is incident on one face of a glass block at an angle of incidence of 40°. The glass block is in air. The refrac…
A rod of metal is heated at one end. Which statement best describes the conduction of heat through the metal?
Many gas appliances such as ovens and heaters use a small flame to ignite the main burner. To make sure that the smal…
A hot liquid is allowed to cool. The graph shows the cooling curve. In which part of the curve is latent heat released?